Resource Technology Associates

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5008085 Apparatus for thermal treatment of a hydrocarbon streamExpiredMar 31, 89Apr 16, 91[G05D]
4849025 Decoking hydrocarbon reactors by wet oxidationExpiredJun 05, 87Jul 18, 89[B08B]
4818371 Viscosity reduction by direct oxidative heatingExpiredJun 05, 87Apr 04, 89[C07C, C10G]
4778586 Viscosity reduction processing at elevated pressureExpiredJun 05, 87Oct 18, 88[C10G]
4708804 Method for recovery of cyanide from waste streamsExpiredJun 28, 85Nov 24, 87[C02F]
4690752 Selective flocculation process for the recovery of phosphateExpiredApr 03, 85Sep 01, 87[B03D]
4648964 Separation of hydrocarbons from tar sands frothExpiredAug 30, 85Mar 10, 87[C10G]
4618480 Recovery of alumina values from alunite oreExpiredAug 15, 84Oct 21, 86[C01F]
4606764 Method of recovering metals from ores using a formate reducing agentExpiredJan 11, 85Aug 19, 86[C22B]
4582613 Use of copper (II) oxide as source of oxygen for oxidation reactionsExpiredSep 24, 84Apr 15, 86[C02F]

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