PENSION BENEFIT GUARANTY CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4892700 Process for making multilayered, formable laminatesExpiredOct 07, 87Jan 09, 90[B29C]
4707894 Fastening system for interconnecting sheets of plastic materials including glassExpiredJan 14, 87Nov 24, 87[A44B]
4444480 Rotating drum-containing sheet or web processing apparatusExpiredNov 03, 82Apr 24, 84[G03D]
4444481 Exposure control circuit for a cameraExpiredDec 07, 81Apr 24, 84[G03B]
4444825 Fire-screening panelExpiredAug 23, 82Apr 24, 84[B32B]
4438171 Coextruded product of AES-thermoplastic graft copolymerExpiredAug 09, 82Mar 20, 84[B32B]

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