GTE SYLVANIA INCORPORATED

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4698548 Lamp incorporating phosphor blend of calcium fluorophosphate and strontium halophosphateExpiredMar 05, 87Oct 06, 87[H01J]
4393505 Gas discharge laser having a buffer gas of neonExpiredNov 03, 81Jul 12, 83[H01S]
4340910 CRT Spot suppression circuitExpiredSep 24, 79Jul 20, 82[H01J, H04N, H02H]
4234883 Noise adaptive correlatorExpiredSep 26, 74Nov 18, 80[H04B]
4225792 Detector circuitExpiredDec 26, 78Sep 30, 80[H02J]
4224478 Data transmission circuit for establishing a bidirectional data path in a telephone systemExpiredDec 04, 78Sep 23, 80[H04M]
4224602 Signalling deviceExpiredDec 04, 78Sep 23, 80[G08B, H04B, H01H]
4222024 Thermistor assemblyExpiredJan 29, 79Sep 09, 80[H01C]
4220825 Telephone status monitor circitExpiredDec 04, 78Sep 02, 80[H04M]
4220872 DC power supply circuitExpiredDec 26, 78Sep 02, 80[H02J]
4210844 Cathode ray tube arc suppressor coatingExpiredNov 20, 78Jul 01, 80[H01J]
4201601 Copper brazing alloy foils containing germaniumExpiredMar 08, 79May 06, 80[C22C]
4201719 Precious metal nitrogenous organo reaction productsExpiredOct 21, 77May 06, 80[C07F]
4199735 Optical compensation for thermal lensing in conductively cooled laser rodExpiredJul 03, 78Apr 22, 80[H01S]
4197152 Attaching self-supporting emissive film to cathode supportExpiredMar 14, 79Apr 08, 80[C09J]
4197153 Attaching self-supporting emissive film to cathode supportExpiredMar 14, 79Apr 08, 80[C09J]
4195264 Noise detection circuitExpiredApr 26, 78Mar 25, 80[H03K]
4195278 High voltage terminal structure and flyback transformerExpiredJan 15, 79Mar 25, 80[H01F]
4188567 Constant-current vertical amplifierExpiredOct 03, 77Feb 12, 80[H01J]
4188568 Power saving circuitExpiredAug 14, 78Feb 12, 80[H01J]

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