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Class Information
Number: 423/213.2
Name: Chemistry of inorganic compounds > Modifying or removing component of normally gaseous mixture > Mixture is exhaust from internal-combustion engine > Utilizing as solid sorbent, catalyst, or reactant a material containing a transition element
Description: Processes, in which the material used to treat the gaseous mixture is in the solid-state and comprises a transition element, or compound thereof, and which functions to (1) modify a component, or (2) attract and retain a component, or (3) react with and chemically change a component.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5840649 |
NOx adsorbents |
Nov. 24, 1998 |
| 5837212 |
Potassium/manganese nitrogen oxide traps for lean-burn engine operation |
Nov. 17, 1998 |
| 5834395 |
Catalyst for controlling emissions |
Nov. 10, 1998 |
| 5830421 |
Material and system for catalytic reduction of nitrogen oxide in an exhaust stream of a combustion process |
Nov. 3, 1998 |
| 5814287 |
Polymerization catalyst enhanced hydrocarbon trapping process |
Sep. 29, 1998 |
| 5807528 |
Catalyst for purifying exhaust gas |
Sep. 15, 1998 |
| 5804155 |
Basic zeolites as hydrocarbon traps for diesel oxidation catalysts |
Sep. 8, 1998 |
| 5800793 |
Process for reducing NO.sub.x from mobile source engine exhaust |
Sep. 1, 1998 |
| 5801117 |
Comprising supported silver sulfate or silver chloride or silver with sulfuric acid |
Sep. 1, 1998 |
| 5795553 |
Nitrogen oxide adsorbing material |
Aug. 18, 1998 |
| 5792436 |
Method for using a regenerable catalyzed trap |
Aug. 11, 1998 |
| 5788936 |
Catalyst system for converting emissions of a lean-burn engine |
Aug. 4, 1998 |
| 5785937 |
Method for the catalytic conversion of nitrogen oxides present in the exhaust gas of an internal-combustion engine |
Jul. 28, 1998 |
| 5786031 |
Barrier for a metal substrate |
Jul. 28, 1998 |
| 5780002 |
Exhaust gas cleaner and method for cleaning exhaust gas |
Jul. 14, 1998 |
| 5772972 |
Catalyst/hydrocarbon trap hybrid system |
Jun. 30, 1998 |
| 5772973 |
Exhaust gas cleaner and method for removing nitrogen oxides |
Jun. 30, 1998 |
| 5758489 |
Sulfur tolerant Pt/lithium NOx traps |
Jun. 2, 1998 |
| 5756057 |
Method for removal of nitrogen oxides from exhaust gas |
May. 26, 1998 |
| 5753198 |
Hot coal gas desulfurization |
May. 19, 1998 |
| 5746989 |
Method for purifying exhaust gas of a diesel engine |
May. 5, 1998 |
| 5747410 |
Exhaust gas cleaner and method of cleaning exhaust gas |
May. 5, 1998 |
| 5744111 |
Method for cleaning exhaust gas |
Apr. 28, 1998 |
| 5741468 |
Exhaust gas cleaner and method for cleaning exhaust gas |
Apr. 21, 1998 |
| 5736114 |
Spinel-based catalysts for reducing exhaust emissions of NO.sub.x |
Apr. 7, 1998 |
| 5714130 |
Exhaust gas cleaner and method for cleaning exhaust gas |
Feb. 3, 1998 |
| 5714432 |
Exhaust gas cleaner comprising supported silver or silver oxide particles |
Feb. 3, 1998 |
| 5702594 |
Apparatus for treatment of waste water and/or exhaust gases containing fluorine and surface active agents |
Dec. 30, 1997 |
| 5693299 |
Process for the catalytic conversion of exhaust gases using cerium/zirconium mixed oxide catalyst |
Dec. 2, 1997 |
| 5683572 |
Zeolite SSZ-44 |
Nov. 4, 1997 |
| 5676912 |
Process for exhaust gas NO.sub.x, CO, and hydrocarbon removal |
Oct. 14, 1997 |
| 5670443 |
Exhaust gas cleaner and method for cleaning exhaust gas |
Sep. 23, 1997 |
| 5662869 |
Exhaust gas purification method and apparatus therefor |
Sep. 2, 1997 |
| 5660800 |
Emissions control system and method |
Aug. 26, 1997 |
| 5658542 |
Exhaust gas cleaner and method for cleaning same |
Aug. 19, 1997 |
| 5658543 |
Exhaust gas cleaner and method for cleaning same |
Aug. 19, 1997 |
| 5656249 |
Exhaust gas cleaner and method for removing nitrogen oxides |
Aug. 12, 1997 |
| 5645804 |
Method for cleaning exhaust gas containing nitrogen oxides |
Jul. 8, 1997 |
| 5628975 |
Method for purifying exhaust gas from a diesel engine |
May. 13, 1997 |
| 5626826 |
Zirconium/cerium mixed oxide catalyst/catalyst support compositions having high/stable specific surfaces |
May. 6, 1997 |
| 5622680 |
Post-combustion catalysts |
Apr. 22, 1997 |
| 5618505 |
Method for converting lean-burn engine exhust gases using a two stage catalyst system |
Apr. 8, 1997 |
| 5609832 |
Emissions control system and method |
Mar. 11, 1997 |
| 5609839 |
No.sub.x removal catalyst and method of purifying exhaust gas by using the same |
Mar. 11, 1997 |
| 5604174 |
Metal foil catalyst members by aqueous electrophoretic deposition |
Feb. 18, 1997 |
| 5591691 |
Metal foil catalyst members by aqueous electrophoretic deposition |
Jan. 7, 1997 |
| 5589432 |
Exhaust gas cleaner and method for cleaning same |
Dec. 31, 1996 |
| 5587137 |
Exhaust gas conversion method using thermally stable zeolites |
Dec. 24, 1996 |
| 5580534 |
Zeolite-spinel catalyst for the reduction of nitrogen oxides and the process thereof |
Dec. 3, 1996 |
| 5569441 |
System for accelerating the heating rate of a fixed bed catalyst by supplying supplemental energy |
Oct. 29, 1996 |
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