PETRO-CANADA
59Patents
0Active
59Granted
37Portfolio score
Filing activity: Feb 25, 1985 → Jan 21, 2004
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6719054B2 | Method for acid stimulating a subterranean well formation for improving hydrocarbon production | Fixed Constructions | 81 | Expired |
| US6214213A | Solvent process for bitumen seperation from oil sands froth | Chemistry; Metallurgy | 80 | 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 |
| US5876592A | Solvent process for bitumen separation from oil sands froth | Chemistry; Metallurgy | 66 | Expired |
| US4963247A | Hydrocracking of heavy oil in presence of ultrafine iron sulphate | Chemistry; Metallurgy | 65 | Expired |
| US5264118A | Pipeline conditioning process for mined oil-sand | Chemistry; Metallurgy | 63 | Expired |
| US4969988A | Antifoam to achieve high conversion in hydroconversion of heavy oils | Performing Operations; Transporting | 56 | Expired |
| US5755955A | Hydrocracking of heavy hydrocarbon oils with conversion facilitated by control of polar aromatics | Chemistry; Metallurgy | 52 | Expired |
| US5039227A | Mixer circuit for oil sand | Performing Operations; Transporting | 51 | Expired |
| US6119870A | Cycloseparator for removal of coarse solids from conditioned oil sand slurries | Performing Operations; Transporting | 44 | Expired |
| US6007708A | Cold dense slurrying process for extracting bitumen from oil sand | Performing Operations; Transporting | 40 | Expired |
| US4788852A | Metering choke | Physics | 40 | Expired |
| US4783268A | Microbubble flotation process for the separation of bitumen from an oil sands slurry | Chemistry; Metallurgy | 37 | Expired |
| US5972202A | Hydrotreating of heavy hydrocarbon oils with control of particle size of particulate additives | Chemistry; Metallurgy | 36 | Expired |
| US6004453A | Hydrocracking of heavy hydrocarbon oils with conversion facilitated by recycle of both heavy gas oil and pitch | Chemistry; Metallurgy | 32 | Expired |
| US6003789A | Nozzle for atomizing liquid in two phase flow | Performing Operations; Transporting | 30 | Expired |
| US6515031B2 | Technique for emulsifying highly saturated hydroisomerized fluids | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6746599B2 | Staged settling process for removing water and solids from oils and extraction froth | Chemistry; Metallurgy | 29 | Expired |
| US5954277A | Agitated slurry pump box for oil sand hydrotransport | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US4863009A | Control system for an endless belt conveyor train | Physics | 27 | Expired |
| US5772127A | Slurrying oil sand for hydrotransport in a pipeline | Performing Operations; Transporting | 25 | Expired |
| US5118408A | Reducing the water and solids contents of bitumen froth moving through the launder of a spontaneous flotation vessel | Chemistry; Metallurgy | 24 | Expired |
| US6410488B1 | Drilling fluid | Emerging Cross-Sectional Technologies | 23 | Expired |
| US6076753A | Agitated slurry pump box for oil sand hydrotransport | Mechanical Engineering; Lighting; Heating | 20 | Expired |
| US4652385A | Lubricating oil compositions containing novel combination of stabilizers | Chemistry; Metallurgy | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.