Gulf Canada Limited
30Patents
0Active
30Granted
37Portfolio score
Filing activity: Oct 7, 1975 → Mar 8, 1989
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4501326A | In-situ recovery of viscous hydrocarbonaceous crude oil | Fixed Constructions | 290 | Expired |
| US4485004A | Catalytic hydrocracking in the presence of hydrogen donor | Chemistry; Metallurgy | 94 | Expired |
| US4545892A | Treatment of primary tailings and middlings from the hot water extraction process for recovering bitumen from tar sand | Emerging Cross-Sectional Technologies | 68 | Expired |
| US4437706A | Hydraulic mining of tar sands with submerged jet erosion | Fixed Constructions | 60 | Expired |
| US4640762A | Process for improving the yield of distillables in hydrogen donor diluent cracking | Chemistry; Metallurgy | 56 | Expired |
| US4294686A | Process for upgrading heavy hydrocarbonaceous oils | Chemistry; Metallurgy | 28 | Expired |
| US4664206A | Stabilizer for drillstems | Fixed Constructions | 23 | Expired |
| US4193770A | Preparation of gasoline containing tertiaryamyl methyl ether | Chemistry; Metallurgy | 22 | Expired |
| US4135022A | Built-up roofing using sulfur asphalt | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4474616A | Blending tar sands to provide feedstocks for hot water process | Chemistry; Metallurgy | 21 | Expired |
| US4434741A | Arctic barge drilling unit | Performing Operations; Transporting | 19 | Expired |
| US4372174A | Method and apparatus for sampling a core of tar sand | Emerging Cross-Sectional Technologies | 15 | Expired |
| US4479742A | Mobile bottom-founded caisson for arctic operations | Fixed Constructions | 14 | Expired |
| US4389378A | Process using sulphate reagent for recovering vanadium from cokes derived from heavy oils | Chemistry; Metallurgy | 13 | Expired |
| US4218569A | Method for processing etherified light hydrocarbon mixtures to remove methanol | Chemistry; Metallurgy | 13 | Expired |
| US4155654A | Apparatus for continuous preparation of sulfur asphalt binders and paving compositions | Fixed Constructions | 12 | Expired |
| US4776949A | Recycle of secondary froth in the hot water process for extracting bitumen from tar sand | Chemistry; Metallurgy | 11 | Expired |
| US4271007A | Method and apparatus for the prevention of solids deposits in a tubular reactor by pulsed flow | Emerging Cross-Sectional Technologies | 11 | Expired |
| US5009773A | Monitoring surfactant content to control hot water process for tar sand | Chemistry; Metallurgy | 11 | Expired |
| US4461624A | Beneficiation of low-rank coals by immersion in residuum | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4489828A | Device for splicing cable ends | Emerging Cross-Sectional Technologies | 9 | Expired |
| US4462892A | Control of process aid used in hot water process for extraction of bitumen from tar sand | Chemistry; Metallurgy | 8 | Expired |
| US4536374A | Process using carbonate reagent for recovering vanadium from cokes and ashes derived from heavy oils | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4472360A | Process using carbonate reagent for recovering vanadium from cokes and ashes derived from heavy oils | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4204077A | Etherification processing of light hydrocarbons | Chemistry; Metallurgy | 5 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.