Occidental Oil Shale, Inc.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4623444 Upgrading shale oil by a combination processExpiredJun 27, 85Nov 18, 86[C10G]
4611856 Two-level, horizontal free face mining system for in situ oil shale retortsExpiredSep 16, 83Sep 16, 86[E21C]
4605489 Upgrading shale oil by a combination processExpiredJun 27, 85Aug 12, 86[C10G]
4595056 Method for fully retorting an in situ oil shale retortExpiredMar 26, 84Jun 17, 86[E21B]
4560205 Method for control of geometry of fragmented mass in an situ oil shale retortExpiredJul 06, 84Dec 24, 85[E21B, E21C, C10B]
4560206 Method for explosively expanding a pillarExpiredJul 26, 83Dec 24, 85[E21C]
4552409 In situ oil shale retort with controlled permeability for uniform flowExpiredMar 19, 84Nov 12, 85[E21B, E21C, C10B]
4533181 Method for forming uniform flow rubble bedExpiredMar 29, 84Aug 06, 85[E21B, E21C]
4531783 Stability control in underground workings adjacent an in situ oil shale retortExpiredMay 29, 84Jul 30, 85[E21C]
4513665 Method for loading explosive charges into blastholes formed in a subterranean formationExpiredJun 06, 83Apr 30, 85[F42D]
4489983 Blasthole spacing for control of particle sizeExpiredDec 29, 82Dec 25, 84[E21B, E21C]
4466668 Method of forming an in situ oil shale retort in formation with jointsExpiredMar 28, 83Aug 21, 84[E21B, E21C]
4458944 Formation of in situ oil shale retort in plural stepsExpiredJun 29, 81Jul 10, 84[E21C]
4458948 Horizontal free face blasting for minimizing channeling and mounding in situ retort with cusp at intermediate elevationExpiredMar 25, 83Jul 10, 84[E21C]
4453769 In situ oil shale retort having horizontal voids with side pillarsExpiredFeb 18, 82Jun 12, 84[E21C]
4449753 Method for bulking full a retortExpiredJun 01, 82May 22, 84[E21B, E21C]
4444433 Method for forming an in situ oil shale retort in differing grades of oil shaleExpiredApr 05, 82Apr 24, 84[E21B, E21C]
4443036 Explosive expansion of formation in lifts for forming an in situ oil shale retortExpiredJul 09, 81Apr 17, 84[E21B]
4443037 Method for controlling void fraction distribution in an in situ oil shale retortExpiredOct 28, 81Apr 17, 84[E21B, E21C]
4441759 In situ oil shale retort systemExpiredOct 29, 81Apr 10, 84[E21B, E21C]

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