Lummus Crest, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5245093 Reaction processes in a multi-stage fluidized bedExpiredJan 26, 89Sep 14, 93[C08G, C07C, B01J]
5227555 Production of gasoline from light hydrocarbonsExpiredJul 12, 88Jul 13, 93[C07C, C10G]
5190634 Inhibition of coke formation during vaporization of heavy hydrocarbonsExpiredDec 02, 88Mar 02, 93[C07C, C10G]
5120429 Co-processing of carbonaceous solids and petroleum oilExpiredJul 10, 87Jun 09, 92[C10G]
5087783 Transalkylation of benzene in a moving bedExpiredNov 09, 90Feb 11, 92[C07C, B01J]
5082481 Membrane separation process for cracked gasesExpiredApr 10, 90Jan 21, 92[F25J]
5003119 Manufacture of alkylbenzenesExpiredFeb 12, 90Mar 26, 91[C07C]
4983272 Process for delayed coking of coking feedstocksExpiredNov 21, 88Jan 08, 91[C10B]
4973780 Alkylation of benzene in a moving bedExpiredApr 27, 88Nov 27, 90[C07C, B01J]
4940687 Catalyst and process for hydrogenation of unsaturated hydrocarbonsExpiredAug 05, 88Jul 10, 90[B01J]
4925638 Thermowell assembly for a vesselExpiredAug 28, 84May 15, 90[G01K]
4875995 Solid addition and withdrawalExpiredFeb 08, 88Oct 24, 89[C10G]
4846958 High severity visbreaking with recycleExpiredMay 26, 88Jul 11, 89[C10G]
4795551 Solvent refining of residuesExpiredJul 15, 85Jan 03, 89[C10C]
4773986 High severity visbreakingExpiredDec 18, 86Sep 27, 88[C10G]
4767521 Treatment of feed for high severity visbreakingExpiredDec 18, 86Aug 30, 88[C10G]
4765398 Vaporization of liquidsExpiredMay 06, 87Aug 23, 88[F22B]
4750554 Internal tube sheet sealing apparatus assembly for tubular heat exchangersExpiredApr 18, 86Jun 14, 88[F28F]
4744887 Solid addition and withdrawalExpiredDec 20, 85May 17, 88[C10G]
4734266 Pump seal oil systemExpiredDec 20, 85Mar 29, 88[F04D]

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