Hudson's Bay Oil and Gas Company Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
4489828 Device for splicing cable endsExpiredApr 05, 82Dec 25, 84[B65G]
4474616 Blending tar sands to provide feedstocks for hot water processExpiredDec 13, 83Oct 02, 84[C10G]
4462892 Control of process aid used in hot water process for extraction of bitumen from tar sandExpiredMar 17, 83Jul 31, 84[C10G]
4456536 Skimmer apparatus for recovering bitumenExpiredJul 10, 81Jun 26, 84[E02B]
4419337 Process and apparatus for reacting sulphur-containing material with oxidizing gasExpiredJun 19, 81Dec 06, 83[C01B, B01D]
4398603 Steam generation from low quality feedwaterExpiredJan 07, 81Aug 16, 83[F22B, E21B]
4372174 Method and apparatus for sampling a core of tar sandExpiredMay 04, 81Feb 08, 83[G01N]
4317033 Gamma ray prospecting systemExpiredNov 16, 79Feb 23, 82[G01T, G01V]
4280990 High pressure process for recovery of sulphur from gasesExpiredApr 03, 80Jul 28, 81[C01B]

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