CLOPAY CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4523620 Window shade clutch assemblyExpiredJan 17, 83Jun 18, 85[E06B]
4465729 Cross-tearable plastic filmsExpiredApr 05, 83Aug 14, 84[B32B]
4429729 Window shade clutch assemblyExpiredJul 09, 82Feb 07, 84[E06B]
4427050 Window shade clutch assemblyExpiredJul 26, 82Jan 24, 84[E06B]
4369399 Control circuit for a motor-driven door operatorExpiredMar 30, 81Jan 18, 83[H02P]
4217327 Method of forming tear lines in plastic filmsExpiredMar 27, 78Aug 12, 80[B28B, B65D]

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