ECYSTA CORPORATION, A CORP OF DE.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4590955 Cigarette paper with reduced CO on burningExpiredJul 11, 84May 27, 86[A24B, A24D]
4450847 Wrapper for smoking articles and methodExpiredApr 07, 82May 29, 84[A24D]
4447709 Method for electrically perforating dielectric websExpiredDec 21, 79May 08, 84[H05B]
4433697 Wrapper for smoking articles and methodExpiredApr 07, 82Feb 28, 84[A24B, A24D]
4420002 Wrapper for smoking articles and methodExpiredApr 07, 82Dec 13, 83[A24D]
4314142 Spatially distributed electrostatic perforation of moving websExpiredJul 22, 80Feb 02, 82[H05B]
4297559 Apparatus for controlled perforation of moving webs with fixed focus laser beamExpiredMay 10, 79Oct 27, 81[H05B, B23K]
4253010 Spatially distributed electrostatic perforation of moving websExpiredApr 23, 79Feb 24, 81[H05B]
4231377 Wrapper for smoking articles containing magnesium oxideExpiredAug 30, 78Nov 04, 80[A24B, A24D]
4225636 High porosity carbon coated cigarette papersExpiredMar 08, 79Sep 30, 80[B05D, A24D]
4218606 Apparatus for perforating webs with high intensity, coherent radiationExpiredOct 03, 78Aug 19, 80[H05B]

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