Jenaer, Glaswerk, Schott & Gen.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4780369 Porous glass membrane tubesExpiredApr 12, 84Oct 25, 88[B32B, B01D]
4516999 Process for the thermal tempering of glassExpiredJun 01, 82May 14, 85[C03B]
4515621 Sheet rolling machineExpiredJan 19, 84May 07, 85[C03B]
4492217 Panel assembly, particularly a glass or vitreous ceramic heater or cooker panel assemblyExpiredFeb 25, 83Jan 08, 85[F24C]
4465339 Electrochromic mirrorsExpiredMar 09, 81Aug 14, 84[G02F]
4436626 Capillary diaphragms for use in diafiltrationExpiredMay 14, 82Mar 13, 84[B01D]
4411781 High pressure ultra-filtration systemExpiredJan 10, 79Oct 25, 83[B01D]
4363956 Cooking panel unit for installation in work surfaceExpiredMar 16, 81Dec 14, 82[H05B]
4318548 Angularly adaptable sealExpiredJun 13, 80Mar 09, 82[F16L, F16J]
4313746 Process for making formed glass from plate glassExpiredApr 03, 80Feb 02, 82[C03B]
4298388 Alkali-free sealing glasses for molybdenumExpiredOct 08, 80Nov 03, 81[C03C]
4296742 Flat solar energy collector with low heat contact between absorber and edge of collectorExpiredJun 06, 78Oct 27, 81[F24J]
4297142 Optical colored and filter glassExpiredJun 16, 80Oct 27, 81[C03C]
4259118 Thermally high pre-stressable glass with high hot stressing factorsExpiredMay 05, 80Mar 31, 81[C03C]
4257811 Solarization and irradiation resistant optical glassesExpiredJul 23, 79Mar 24, 81[C03C]
4243016 Vitreous ceramic cooker hob plate with permanently elastically adhesively attached circumferentially surrounding frameExpiredApr 04, 79Jan 06, 81[H05B, F24C]
4243299 Optical fibers for communication transmission having high stability to nuclear radiationExpiredSep 12, 78Jan 06, 81[G02B]
4243401 Apparatus for producing double-walled heat insulating containersExpiredApr 18, 79Jan 06, 81[C03B]
4237196 Sodium ion-conducting glass electrolyte for sodium-sulfur batteriesExpiredMar 19, 79Dec 02, 80[H01M]
4230010 Device for cutting glassExpiredApr 04, 79Oct 28, 80[C03B]

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