USI CHEMICALS CO., INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4665138 Process for polymerizing a monomer chargeExpiredMar 21, 85May 12, 87[C08F]
4665139 Process for polymerizing a monomer chargeExpiredMar 21, 85May 12, 87[C08F]
4665140 Process for polymerizing a monomer chargeExpiredMar 25, 85May 12, 87[C08F]
4665141 Process for polymerizing a monomerExpiredMar 25, 85May 12, 87[C08F]
4665143 Co-catalyst dispersion methodExpiredApr 12, 85May 12, 87[C08F]
4643945 Heat sealable blend of polypropylene terpolymers and linear low density polyethyleneExpiredSep 03, 85Feb 17, 87[B32B]
4629749 Clarity of low density polyethylene compositions containing anti-block agents by addition of polyethylene glycolExpiredJul 24, 85Dec 16, 86[C08K]
4582950 Removal of acetylene and carbon monoxide from methane and ethaneExpiredDec 17, 84Apr 15, 86[C01B, C07C]
4491638 Controlled addition of promoters to ethylene oxide catalysts (11)ExpiredAug 30, 83Jan 01, 85[B01J]
4435518 Polymerization catalystExpiredNov 24, 82Mar 06, 84[C08F]
4435519 Novel catalyst compositionExpiredNov 24, 82Mar 06, 84[C08F]
4435520 Catalyst compositionExpiredNov 24, 82Mar 06, 84[C08F]
4434242 Polymerization catalystExpiredNov 24, 82Feb 28, 84[C08F]
4426317 Process for making olefin polymerization catalystExpiredNov 24, 82Jan 17, 84[C08F]
4425439 Upflow drying of regenerated ethylene oxide catalystsExpiredJun 28, 82Jan 10, 84[C07D, B01J]
4391735 Cleaning and regenerating ethylene oxide catalystsExpiredJul 17, 81Jul 05, 83[C07D, B01J]
4278788 Removal of residual catalyst from polyolefin polymersExpiredMar 16, 79Jul 14, 81[C08F]
4232140 Process for polymerizing olefinsExpiredOct 23, 78Nov 04, 80[C08F]

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