GULF OIL CORPORATION

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4670104 Polar solvent dedustingExpiredJun 28, 85Jun 02, 87[C10G]
4608126 Retorting system and disposal siteExpiredMar 26, 84Aug 26, 86[C10B]
4532991 Pulsed retorting with continuous shale oil upgradingExpiredMar 22, 84Aug 06, 85[E21B]
4529497 Disposal of spent oil shale and other materialsExpiredMar 26, 84Jul 16, 85[B09B, C10G]
4415430 Two-stage centrifugal dedusting processExpiredJul 21, 81Nov 15, 83[C10G]
4404085 Drying and dedusting processExpiredJul 21, 81Sep 13, 83[C10G]
4404086 Radial flow retorting process with trays and downcomersExpiredDec 21, 81Sep 13, 83[C10G, C10B]
4378949 Production of shale oil by in-situ retorting of oil shaleExpiredApr 27, 81Apr 05, 83[E21C]
4312364 Apparatus for localized heating of a living tissue, using electromagnetic waves of ultra high frequency, for medical applicationsExpiredApr 05, 78Jan 26, 82[A61N]

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