North American Philips Lighting Corporation

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4973878 Filament structure and method of making such structureExpiredJul 24, 89Nov 27, 90[H01K]
D302471 Compact fluorescent lampExpiredDec 03, 86Jul 25, 89[]
D302472 Compact fluorescent reflector lampExpiredOct 28, 86Jul 25, 89[]
D302473 Compact fluorescent lampExpiredOct 28, 86Jul 25, 89[]
4787865 Three-way lamp bases and method for making themExpiredDec 04, 86Nov 29, 88[H01J]
4781641 Tool for making three-way lamp basesExpiredDec 04, 86Nov 01, 88[H01J]
4774431 Arc tube wire supportExpiredSep 29, 86Sep 27, 88[H01J]
4748368 Three way gas discharge lampExpiredDec 27, 84May 31, 88[H01J, H05B]
4708679 Method of making support means for discharge lamp tubesExpiredSep 29, 86Nov 24, 87[H01J]
4701673 Ballast adaptor for improving operation of fluorescent lampsExpiredMay 16, 86Oct 20, 87[H05B]
4631450 Ballast adaptor for improving operation of fluorescent lampsExpiredDec 28, 83Dec 23, 86[H05B]
4629939 Discharge lamp with automatic shut offExpiredDec 21, 84Dec 16, 86[H01J]
4602956 Cermet composites, process for producing them and arc tube incorporating themExpiredDec 17, 84Jul 29, 86[C22C]
4538091 High-pressure sodium lamp spring clip cross piece for electrode and end plug supportExpiredFeb 16, 83Aug 27, 85[H01J]
4525650 Starting and operating method and apparatus for discharge lampsExpiredJan 10, 84Jun 25, 85[H05B]
4516446 Precision rotating rod guideExpiredFeb 14, 83May 14, 85[B23B, B65H]
4506195 Apparatus for operating HID lamp at high frequency with high power factor and for providing standby lightingExpiredFeb 04, 83Mar 19, 85[H05B]
4503360 Compact fluorescent lamp unit having segregated air-cooling meansExpiredJul 26, 82Mar 05, 85[H01J]
4501992 Energy conserving instant-start series-sequence fluorescent lamp system and fluorescent lamp with overcurrent protectionExpiredAug 23, 82Feb 26, 85[H05B]
4500810 Fluorescent lamp having integral light-filtering means and starting aidExpiredJul 13, 83Feb 19, 85[H01J]

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