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Class Information
Number: 313/611
Name: Electric lamp and discharge devices > With gas or vapor > Having baffle, partition, or constricting means affecting discharge > Constriction means
Description: Subject matter under subclasses 609+ wherein the structure includes, (1) envelope structure which changes the cross-sectional area of the envelope, or (2) physical means within the envelope to reduce the cross-sectional area of the discharge of the discharge device.

Sub-classes under this class:

Class Number Class Name Patents
313/612 Substantially the full length of discharge path 24

Patents under this class:

Patent Number Title Of Patent Date Issued
8008862 Shine-through hydrogen lamp Aug. 30, 2011
7928644 Low pressure discharge lamp with envelope having double helix shape and sealed ends Apr. 19, 2011
7768199 Plasma display-panel comprising a reduced-section discharge expansion zone Aug. 3, 2010
7764018 Gas discharge tube Jul. 27, 2010
7569993 Gas discharge tube with discharge path limiting means Aug. 4, 2009
7382096 Flat fluorescent lamp and liquid crystal display device having the same Jun. 3, 2008
7288880 High-luminance gas discharge tube with diaphragm elements within discharge path Oct. 30, 2007
7288893 Gas discharge tube Oct. 30, 2007
7271542 Gas discharge tube Sep. 18, 2007
7271541 Surface light source with hollow electrode component for use in liquid crystal display devices Sep. 18, 2007
7164223 Multi-tube fluorescent discharge lamp Jan. 16, 2007
6956326 Gas discharge tube having insulator between aperture members Oct. 18, 2005
6924598 Apparatus for providing a kinetic lightning effect Aug. 2, 2005
6873107 Gas discharge tube having multiple stem pins Mar. 29, 2005
6765633 Flat lamp for emitting lights to a surface area and liquid crystal display using the same Jul. 20, 2004
6664726 Fluorescent lamp with a by-pass means in the discharge space resulting in low starting voltage Dec. 16, 2003
6268694 Cold cathode fluorescent lamp, back-light emitting device with the cold cathode fluorescent lamp and note-type personal computer with the back-light emitting device Jul. 31, 2001
5972469 Baffle for eliminating interference ring(s) from the output light pattern of a deuterium lamp Oct. 26, 1999
5763139 Plasma display panel and method for manufacturing the same Jun. 9, 1998
5294867 Low pressure mercury vapor discharge lamp containing an amalgam Mar. 15, 1994
4965484 Vapor discharge lamp with gradient temperature control Oct. 23, 1990
4961024 Circular fluorescent lamp with oval section of tube Oct. 2, 1990
4825125 Discharge lamp having multiple constrictions Apr. 25, 1989
4816719 Low pressure arc discharge tube with reduced ballasting requirement Mar. 28, 1989
4801841 Gas discharge lamp with built-in resistance to color center formation in ultraviolet-transmissive window Jan. 31, 1989
4786841 Low-pressure arc discharge lamp having increased surface brightness Nov. 22, 1988
4761548 Optically triggered high voltage switch with cesium vapor Aug. 2, 1988
4524301 Compact fluorescent lamps Jun. 18, 1985
4515477 Visibility meter and components used therein May. 7, 1985
4508993 Fluorescent lamp without ballast Apr. 2, 1985
4504768 Electrodeless lamp using a single magnetron and improved lamp envelope therefor Mar. 12, 1985
4403167 Segmented discharge tube devices Sep. 6, 1983
4374340 Low pressure discharge lamp Feb. 15, 1983
4366408 Arc discharge lamp having large anode radiating surface Dec. 28, 1982
4199703 Low inductance, high intensity, gas discharge VUV light source Apr. 22, 1980
4170743 High-current, low pressure, mercury discharge lamp with pressure compensation space Oct. 9, 1979
4143339 Laser plasma tube having internal gas path Mar. 6, 1979
3988633 Fluorescent lamp with envelope grooves Oct. 26, 1976

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