| Class Number |
Class Name |
No. of Patents |
| 376/913 |
Antimatter devices and methods |
13 |
| 376/317 |
Combined |
50 |
| 376/322 |
For storing excess energy |
18 |
| 376/323 |
With chemical reaction |
23 |
| 376/324 |
To produce a combustible fuel |
27 |
| 376/325 |
Cracking of hydrocarbons |
12 |
| 376/320 |
With direct conversion means |
22 |
| 376/321 |
Thermionic |
26 |
| 376/326 |
With laser |
27 |
| 376/318 |
With propulsion means |
33 |
| 376/319 |
Gaseous core |
10 |
| 376/327 |
Control component for a fission reactor |
188 |
| 376/335 |
Flexible control element |
20 |
| 376/336 |
Fuse actuated devices |
51 |
| 376/337 |
Particulate type |
9 |
| 376/331 |
Gaseous control component |
8 |
| 376/328 |
Liquid control component |
53 |
| 376/330 |
Liquid metal control component |
3 |
| 376/329 |
With vaporization |
7 |
| 376/339 |
Nonconventional control material |
91 |
| 376/338 |
Particulate type (e.g., balls) |
22 |
| 376/332 |
Telescopic control devices |
3 |
| 376/333 |
Wherein concentration of the reactivity affecting material varies radially or axially of the control element |
86 |
| 376/334 |
By utilizing a follower |
3 |
| 376/153 |
Detection of radiation by an induced nuclear reaction |
75 |
| 376/154 |
By fission |
43 |
| 376/155 |
With boron |
9 |
| 376/918 |
Entire reactor core of single integral structure |
2 |
| 376/346 |
Epi-thermal reactor structures (e.g., intermediate neutron spectrum) |
15 |
| 376/308 |
Fission reactor material (including reaction products) treatment |
52 |
| 376/310 |
Impurity removal |
294 |
| 376/312 |
By cold traps or hot traps |
33 |
| 376/313 |
By filters, ion exchangers, or absorbers |
280 |
| 376/315 |
Electrostatic or magnetic filters |
22 |
| 376/314 |
Gas filters (e.g., adsorbers) |
122 |
| 376/316 |
By pressurized fluid (i.e., blowdown) |
102 |
| 376/311 |
Reprocessing of fuel during reactor operation |
17 |
| 376/309 |
Post accident impurity or contaminant removal |
63 |
| 376/409 |
Fuel component structure |
57 |
| 376/412 |
Encased with nonfuel component |
58 |
| 376/419 |
Burnable poison |
123 |
| 376/414 |
Coated, preformed, or impregnated layer or part or adhesively bonded layers or parts |
97 |
| 376/415 |
Lubricating layer |
18 |
| 376/416 |
Multiple or composite cladding-type layers |
114 |
| 376/417 |
Including getter layer or barrier layer |
85 |
| 376/424 |
Coolant or heat exchange material |
11 |
| 376/418 |
Getter, fission product retainer of filter |
67 |
| 376/425 |
Heat insulating material |
10 |
| 376/421 |
Homogeneously intermixed |
40 |
| 376/422 |
Alloyed fuel |
16 |
| 376/420 |
Interpellet spacing or positioning means |
34 |
| 376/423 |
Moderator or reflector |
21 |
| 376/413 |
With internal pressurizer |
8 |
| 376/453 |
Fuel support or covering provided with fins, projections, prongs, etc.) |
24 |
| 376/454 |
With external fins, projections, prongs, etc. |
38 |
| 376/451 |
Having particular end closure or seal (e.g., weld, plug, cap, etc.) |
112 |
| 376/452 |
With indexing means |
12 |
| 376/455 |
Hollow, annular, or graduated fuel layers or members (e.g., concentric, helical, etc.) |
32 |
| 376/457 |
Nonconventional jacket or can material |
139 |
| 376/426 |
Plural fuel segments or elements |
23 |
| 376/429 |
Complementary segments within same container |
12 |
| 376/431 |
Concentric cylindrical elements |
11 |
| 376/434 |
In pack or bundle |
162 |
| 376/449 |
Having provision or structure for insertion of control elements therein |
92 |
| 376/437 |
Having the fuel element ends positioned on or attached to rails |
15 |
| 376/438 |
Including grid |
232 |
| 376/440 |
For ends of fuel elements |
77 |
| 376/439 |
With coolant flow path deflecting means |
191 |
| 376/442 |
With fuel element contacting protuberance or projection |
235 |
| 376/441 |
With nonintegral fuel element contacting means |
112 |
| 376/447 |
Including separate burnable poison or moderator |
76 |
| 376/435 |
Wherein the fissile content varies radially or axially across the pack or bundle |
157 |
| 376/436 |
Wire-wrapped fuel elements |
25 |
| 376/443 |
With coolant flow path deflecting means |
177 |
| 376/444 |
With coolant flow bypass means |
173 |
| 376/448 |
With means for spacing apart adjacent packs or bundles |
99 |
| 376/446 |
With removable member |
232 |
| 376/445 |
With thermal expansion compensating means |
52 |
| 376/427 |
In solid moderator block |
33 |
| 376/432 |
Plate-type fuel elements |
19 |
| 376/430 |
Spherically shaped segments within same container |
8 |
| 376/433 |
Stacked (e.g., candu type reactor fuel components) |
33 |
| 376/428 |
Wherein the fissile content varies radially or axially within the same container (e.g., plural fuel layers) |
79 |
| 376/411 |
Spherical particles |
58 |
| 376/456 |
Vented fuel |
30 |
| 376/450 |
With condition sensing or indicating means |
40 |
| 376/410 |
With means to prevent thinning of the cladding (e.g., amoeba effect) |
12 |
| 376/915 |
Fusion reactor fuels |
19 |
| 376/462 |
Grids |
137 |
| 376/260 |
Handling of fission reactor component structure within reactor system |
733 |
| 376/261 |
Fuel component |
440 |
| 376/264 |
Charging or discharging of fuel |
82 |
| 376/265 |
Refueling ball-type reactors |
21 |
| 376/266 |
Means for separating low exposure from high exposure elements |
8 |
| 376/267 |
Refueling schemes, patterns, or fuel cycles (e.g., in/out systems) |
91 |
| 376/262 |
Including handling of a second different, diverse reactor component (e.g., control element, moderator element, vessel cover removal) |
105 |
| 376/263 |
With pressure vessel cover removal |
57 |
| 376/268 |
Refueling machines |
86 |
| 376/271 |
Upper axial transfer |
71 |
| 376/269 |
With magazine |
27 |
| 376/270 |
With nonaxial transfer capability |
37 |
| 376/272 |
Storage container systems for new and/or irradiated core elements |
637 |
| 376/916 |
Methods of making fusion fuel targets |
55 |
| 376/463 |
Miscellaneous |
168 |
| 376/909 |
Mobile reactors |
22 |
| 376/458 |
Moderator or reflector component structure for a fission reactor |
45 |
| 376/459 |
With means for keying or assembling moderator blocks together |
19 |
| 376/914 |
Nuclear explosives |
13 |
| 376/100 |
Nuclear fusion |
60 |
| 376/150 |
Chamber structure or material |
64 |
| 376/107 |
Fusion reaction by plural colliding plasmas or particle beams |
63 |
| 376/151 |
Fusion targets or pellets |
22 |
| 376/152 |
For inertial confinement |
63 |
| 376/108 |
Including accelerating particles into a stationary or static target (e.g., cockcroft-walton generator type) |
41 |
| 376/112 |
Cyclotron type acceleration of nuclei |
9 |
| 376/114 |
Self-contained neutron sources (e.g., neutron or accelerator tube) |
29 |
| 376/115 |
With cooled electrodes or target |
11 |
| 376/116 |
With ion beam collimator or filtering structure (e.g., extractor electrode) |
14 |
| 376/118 |
Subterranean sources |
8 |
| 376/119 |
With control circuitry |
16 |
| 376/113 |
With electrostatic voltage generating means |
6 |
| 376/117 |
With ion beam collimator or filtering structure |
10 |
| 376/110 |
With means for modifying the resultant neutron output, e.g., moderator means |
18 |
| 376/111 |
With means to pulsate ion beam |
9 |
| 376/109 |
With target replenishing |
12 |
| 376/120 |
Including bunched particle beam |
13 |
| 376/146 |
Including removal or use of impurities or reaction products (e.g., energy) |
135 |
| 376/147 |
Direct conversion of energy |
40 |
| 376/148 |
Including use of heat or radiation to effect a chemical reaction |
25 |
| 376/102 |
Inertial confinement (e.g., nuclear explosive) |
21 |
| 376/105 |
Particle beam irradiation (excluding photons) |
32 |
| 376/106 |
Ion beam irradiation |
26 |
| 376/103 |
Photon beam (e.g., laser) irradiation |
20 |
| 376/104 |
Optics |
53 |
| 376/121 |
Magnetic confinement of plasma |
23 |
| 376/131 |
Auxiliary heating |
7 |
| 376/132 |
Electromagnetic wave energy |
19 |
| 376/125 |
Imploding liners |
19 |
| 376/139 |
Linear confinement |
14 |
| 376/140 |
Mirror devices |
23 |
| 376/141 |
Plasma formed or contained between spaced electrodes |
4 |
| 376/142 |
Magnetic structure |
68 |
| 376/122 |
Plasma formed in situ by laser |
10 |
| 376/123 |
Principal heating by wave energy |
25 |
| 376/124 |
Heating by time varying magnetic field (e.g., by compression) |
6 |
| 376/133 |
Toroidal confinement of plasma |
66 |
| 376/138 |
Bumpy torus |
3 |
| 376/134 |
Divertors |
15 |
| 376/135 |
Effuser |
4 |
| 376/136 |
Limiters or liners |
35 |
| 376/137 |
With solid internal conductor |
14 |
| 376/143 |
With circuitry |
70 |
| 376/126 |
With enveloping charged particle confinement (e.g., e or p layer) |
7 |
| 376/127 |
With injection of electrically charged or accelerated particles |
59 |
| 376/129 |
Negatively charged particle injection |
22 |
| 376/130 |
Neutral particle injection |
49 |
| 376/128 |
Plasma injection |
27 |
| 376/101 |
Pellet guidance systems (e.g., pellet injection means) |
19 |
| 376/144 |
Plasma formed between spaced electrodes |
32 |
| 376/145 |
Plasma focus |
17 |
| 376/149 |
Shock wave heating of plasma or gas (e.g., mhd heating) |
9 |
| 376/912 |
Nuclear reactor systems situated in the ocean |
15 |
| 376/156 |
Nuclear transmutation (e.g., by means of particle or wave energy) |
62 |
| 376/190 |
By charged particle bombardment |
44 |
| 376/196 |
Alpha (helium nucleus) bombardment |
10 |
| 376/197 |
Wherein the reaction product is an actinide or transuranium element |
5 |
| 376/198 |
With reaction product treatment (e.g., recovery, separation) |
11 |
| 376/191 |
Alpha-neutron sources |
12 |
| 376/199 |
Deuteron bombardment |
19 |
| 376/200 |
Wherein the reaction product is an actinide or transuranium element |
4 |
| 376/201 |
With reaction product treatment (e.g., recovery, separation) |
19 |
| 376/194 |
Proton bombardment |
45 |
| 376/195 |
With reaction product treatment (e.g., recovery, separation) |
59 |
| 376/192 |
To produce spallation reactions |
23 |
| 376/193 |
To produce fissile isotopes |
5 |
| 376/158 |
By neutron bombardment |
68 |
| 376/170 |
Actinides |
29 |
| 376/171 |
Breeder or converter reactor structures |
29 |
| 376/179 |
Coolant manipulated and used exterior of reactor core |
3 |
| 376/172 |
Fertile fuel assembly structure or arrangement |
32 |
| 376/173 |
Having internal fertile regions |
35 |
| 376/178 |
Fuel assembly holddown or support |
6 |
| 376/174 |
Having particular coolant fluid flow path or pattern within reactor core |
7 |
| 376/175 |
Orifice or fluid control at inlet or outlet of coolant channels |
14 |
| 376/176 |
Hydraulic holddown |
1 |
| 376/177 |
Plural coolant loops or passes through reactor core |
2 |
| 376/182 |
Formation of plutonium isotopes |
7 |
| 376/180 |
Formation of uranium isotopes |
5 |
| 376/181 |
Uranium 233 |
8 |
| 376/185 |
Alkali and alkaline elements |
9 |
| 376/183 |
Doping of semiconductors |
24 |
| 376/168 |
Halogens |
5 |
| 376/169 |
Iodine |
13 |
| 376/187 |
Lead, polonium, bismuth |
3 |
| 376/186 |
Molybdenum, technetium |
22 |
| 376/159 |
Neutron activation analysis |
204 |
| 376/160 |
Subterranean |
15 |
| 376/161 |
Specific nuclides |
10 |
| 376/165 |
Hydrogen, chlorine |
15 |
| 376/162 |
Metals |
15 |
| 376/163 |
Aluminum, silicon |
9 |
| 376/164 |
Uranium |
7 |
| 376/166 |
Oxygen, carbon |
30 |
| 376/167 |
With tracer injection |
5 |
| 376/184 |
Rare earths |
8 |
| 376/188 |
Sulfur, phosphorus |
2 |
| 376/189 |
With reaction product treatment (e.g., recovery, separation) |
51 |
| 376/157 |
Gamma or charged particle activation analysis |
52 |
| 376/202 |
Irradiation capsule, holder, or support |
55 |
| 376/900 |
Particular material or material shapes for fission reactors |
108 |
| 376/901 |
Fuel |
47 |
| 376/903 |
Shapes |
11 |
| 376/902 |
With external lubricating or absorbing material |
10 |
| 376/904 |
Moderator, reflector, or coolant materials |
31 |
| 376/907 |
Dissociative coolants |
4 |
| 376/906 |
Metal |
13 |
| 376/905 |
Organic |
4 |
| 376/911 |
Plural reactor systems |
14 |
| 376/908 |
Reactor geometry (or part thereof) defined in terms of numerical values |
6 |
| 376/277 |
Reactor protection or damage prevention |
123 |
| 376/298 |
Auxiliary heat removal structure |
163 |
| 376/299 |
Decay heat removal |
181 |
| 376/278 |
By minimizing positive coolant void coefficient |
3 |
| 376/280 |
Core catchers |
77 |
| 376/302 |
Core restraint means |
78 |
| 376/304 |
For moderator structures |
10 |
| 376/303 |
In-core restraint means |
13 |
| 376/305 |
Corrosion or damage prevention |
188 |
| 376/306 |
By addition of material to coolant |
129 |
| 376/282 |
Emergency core coolant systems (e.g., injecting coolant into reactor or pipe systems) |
179 |
| 376/285 |
Expansion means (e.g., shock absorbers, roller bearings) |
212 |
| 376/286 |
Pipe expansion joints |
52 |
| 376/279 |
Fire extinguishing or prevention |
12 |
| 376/281 |
Fluid flow reversal protection |
33 |
| 376/283 |
Pressure suppression and relief |
185 |
| 376/284 |
By fusible means (e.g., ice) |
27 |
| 376/300 |
Recombiners |
31 |
| 376/301 |
Catalytic |
60 |
| 376/287 |
Shield or barrier between radiation or heat source and object to be protected (e.g., insulation, thermal shield) |
197 |
| 376/292 |
Concentric tubes or conduits |
91 |
| 376/293 |
Containment structures |
160 |
| 376/294 |
Pressure vessels |
94 |
| 376/295 |
Concrete |
23 |
| 376/296 |
Prestressed |
44 |
| 376/288 |
Particular materials |
55 |
| 376/289 |
Thermal insulation |
81 |
| 376/291 |
Concentric tubes or conduits with insulation |
36 |
| 376/290 |
For liquid metal cooled fast reactors (e.g., insulation for vault roof, or for the vessel walls as by a layer of stagnant or quasi-stagnant coolant) |
78 |
| 376/307 |
With pressurizer means |
66 |
| 376/297 |
With turbine protection means (e.g., turbine trip or overspeed protection means) |
12 |
| 376/340 |
Reactor structures with testing or irradiation facilities |
17 |
| 376/341 |
With material holder or support positioned outside the radiation source |
12 |
| 376/342 |
With provision for insertion of material to be irradiated into the radiation means |
14 |
| 376/344 |
By fluid pressure |
2 |
| 376/345 |
Wherein the fluid is a liquid |
0 |
| 376/343 |
Flux trap reactor structures |
3 |
| 376/347 |
Reactor structures |
31 |
| 376/361 |
Circulating fluid within reactor |
33 |
| 376/383 |
Fluid is a gas |
10 |
| 376/385 |
Having specified flow path or pattern within reactor core |
7 |
| 376/387 |
Plural passes through core |
4 |
| 376/388 |
Re-entrant type |
1 |
| 376/386 |
Plural separate loops |
4 |
| 376/389 |
With particular flow directing or diverting means (e.g., flow baffle) |
16 |
| 376/390 |
With core bypass means (e.g., passage along core barrel or through shield structure) |
9 |
| 376/391 |
Manipulated or used exterior of the reactor core |
60 |
| 376/393 |
With coaxial flow |
15 |
| 376/392 |
With jet pump |
13 |
| 376/394 |
With single structure component containment (e.g., pod arrangement) |
23 |
| 376/384 |
Wherein the gas is steam |
1 |
| 376/362 |
Fuel assembly supports |
59 |
| 376/364 |
Fuel assembly holddown or locking means |
106 |
| 376/365 |
Hydraulic or pneumatic |
15 |
| 376/363 |
Suspended fuel assembly |
9 |
| 376/395 |
Having specified fluid flow path or pattern within reactor core |
19 |
| 376/401 |
One-fluid-type pressure tube reactor |
6 |
| 376/397 |
Plural passes |
7 |
| 376/398 |
Re-entrant type |
3 |
| 376/396 |
Plural separate coolant loops through reactor core |
3 |
| 376/399 |
With particular flow directing or diverting means (e.g., flow baffle) |
74 |
| 376/400 |
With core bypass means (e.g., passage along core barrel or through shield structure) |
33 |
| 376/402 |
Manipulated or used exterior of reactor core |
171 |
| 376/406 |
Compact or integral (e.g., heat exchanger, core, pumps in same vessel) |
52 |
| 376/403 |
Including tank, pool, or reservoir (e.g., swimming pool) |
31 |
| 376/404 |
Having reactor core and heat exchanger or pump therein |
71 |
| 376/405 |
With particular heat exchanger structure |
73 |
| 376/407 |
With jet pumps |
40 |
| 376/408 |
With means or structure to flash coolant into vapor |
4 |
| 376/381 |
Pebble bed reactor |
85 |
| 376/382 |
Having core of separate pebble containers |
8 |
| 376/366 |
Plural fluids or a fluid in plural phases circulating within reactor (e.g., pressure tube reactors) |
15 |
| 376/367 |
In heat pipe means |
42 |
| 376/368 |
Including chemically distinct gas |
13 |
| 376/369 |
With formation, separation, or manipulation of a second gas |
3 |
| 376/370 |
With formation, separation, or manipulation of a vapor (e.g., boiling water reactor (bwr) type) |
53 |
| 376/373 |
Having specified fluid flow path or pattern within reactor core |
21 |
| 376/374 |
Plural separate coolant loops through reactor core |
6 |
| 376/377 |
With particular flow directing or diverting means (e.g., flow baffle) |
47 |
| 376/375 |
With plural, coolant passes through reactor core |
1 |
| 376/376 |
Re-entrant type |
4 |
| 376/380 |
Nonaqueous vapor |
1 |
| 376/378 |
Vapor manipulated or used exterior of reactor core |
7 |
| 376/379 |
With flow control of fluid within reactor |
16 |
| 376/372 |
With jet pump |
51 |
| 376/371 |
With vapor-liquid separating means |
55 |
| 376/348 |
Fast thermal composite core |
5 |
| 376/349 |
Flux flattening |
25 |
| 376/354 |
Fuel material in contact with and supported by fluid |
2 |
| 376/355 |
Fluidized beds |
7 |
| 376/356 |
Fuel dispersed in liquid moderator, solution, etc. |
3 |
| 376/357 |
Vapor forming, separating, or manipulating |
0 |
| 376/358 |
With particular in situ reconstitution or modification of fuel moderator material |
5 |
| 376/359 |
Fuel in molten state or in molten vehicle |
6 |
| 376/360 |
Fuel in form of fused salt |
7 |
| 376/350 |
Moderator component varies in its effective density or materials |
6 |
| 376/351 |
Spaced internal reflectors or moderators |
9 |
| 376/352 |
Orifice or fluid control at inlet or outlet of coolant channels |
229 |
| 376/353 |
With particular control rod guide structure |
159 |
| 376/460 |
Rotating plug-type cover |
26 |
| 376/910 |
Rotating reactors |
4 |
| 376/203 |
Seal arrangements |
303 |
| 376/205 |
Between pressure vessel cover and vessel or portion thereof |
81 |
| 376/206 |
Rotating plug-type cover |
40 |
| 376/204 |
For nozzle |
98 |
| 376/273 |
Subterranean reactor structures (e.g., underground containment, underground explosive) |
36 |
| 376/275 |
For extracting materials or energy from the earth |
4 |
| 376/276 |
In the form of heated water or steam |
5 |
| 376/274 |
For minimizing radioactive contamination within an underground chamber or of the material removed therefrom |
9 |
| 376/245 |
Testing, sensing, measuring, or detecting a fission reactor condition |
590 |
| 376/259 |
By particular instrumentation circuitry |
176 |
| 376/246 |
Flowmeters |
67 |
| 376/254 |
Flux monitoring |
198 |
| 376/255 |
Directly generating electrical signal (e.g., ion detection) |
72 |
| 376/257 |
Fuel assay (e.g., burnup) |
64 |
| 376/256 |
Gas sensors (e.g., hydrogen detectors) |
63 |
| 376/250 |
Leak detection |
122 |
| 376/251 |
Fuel element leak detection |
76 |
| 376/252 |
By acoustic or ultrasonic wave energy |
118 |
| 376/253 |
By the detection of fission products external to the fuel element |
86 |
| 376/248 |
Optics |
143 |
| 376/258 |
Position detection |
245 |
| 376/247 |
Temperature or pressure measurement |
203 |
| 376/249 |
Vessel monitoring or inspection |
283 |
| 376/917 |
Utilizing different fuels or fuels in different forms, in different reactor regions in relation to amounts of heat produced in said regions |
8 |
| 376/461 |
Vessel support (e.g., core vessel supports) |
114 |
| 376/207 |
With control of reactor (e.g., control of coolant flow) |
34 |
| 376/212 |
By altering quantity of characteristic of fuel within critical area |
14 |
| 376/213 |
Wherein control element includes a fissile material |
7 |
| 376/210 |
By coolant flow |
82 |
| 376/211 |
Exterior of core (e.g., secondary loop control) |
52 |
| 376/215 |
By electronic signal processing circuitry (e.g., plural redundant circuits) |
117 |
| 376/216 |
Plural sensed different conditions or measured variables correlated |
194 |
| 376/217 |
Control programs |
120 |
| 376/218 |
Xenon control |
14 |
| 376/219 |
By movement of control element or by release of neutron absorbing material |
78 |
| 376/232 |
By motion transforming means, e.g., rack and pinion |
24 |
| 376/227 |
Control element movable by means of cable and winch, chains or reels |
9 |
| 376/224 |
Finger-type control elements (insertable into fuel element positions) |
19 |
| 376/225 |
Including shock absorber |
20 |
| 376/236 |
Including control rod insertion and removal schemes |
56 |
| 376/237 |
Group movement of control elements |
33 |
| 376/238 |
Setback |
15 |
| 376/234 |
Including shock absorber |
43 |
| 376/235 |
Means for locking control element in desired position |
31 |
| 376/233 |
Releasable coupling |
83 |
| 376/239 |
Rod or support carrying plural elements or diverse materials |
16 |
| 376/223 |
Rotatable control elements |
15 |
| 376/226 |
Wherein control element is driven directly into bed of fuel elements |
15 |
| 376/228 |
Wherein driver or motivating is electric |
40 |
| 376/229 |
Electrofluidic |
8 |
| 376/230 |
Wherein driver or motivating is fluid |
58 |
| 376/231 |
Pneumatic |
9 |
| 376/220 |
Wherein the control element is a reflector or moderator material |
30 |
| 376/221 |
Variable fluent reflector/moderator level or density |
24 |
| 376/222 |
Moderator dump |
0 |
| 376/242 |
Means to inhibit control rod movement |
42 |
| 376/241 |
Power output control (e.g., load follows with steam dump) |
50 |
| 376/208 |
Pulsed reactors |
10 |
| 376/214 |
Reactor start-up |
32 |
| 376/240 |
Sensing or detecting device attached to, embedded in, or integral with control element |
16 |
| 376/209 |
Spectral shift |
53 |
| 376/244 |
Temperature reactivity control |
16 |
| 376/243 |
With cooling of control element |
18 |
