Shell Canada Limited
8Patents
0Active
8Granted
30Portfolio score
Filing activity: Aug 20, 1975 → Aug 26, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4035282A | Process for recovery of bitumen from a bituminous froth | Chemistry; Metallurgy | 100 | Expired |
| US5318124A | Recovering hydrocarbons from tar sand or heavy oil reservoirs | Fixed Constructions | 33 | Expired |
| US4876004A | Topological separator | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6824600B2 | Paving binders and manufacturing methods | Chemistry; Metallurgy | 19 | Expired |
| US6863724B2 | Sulfur additives for paving binders and manufacturing methods | Chemistry; Metallurgy | 15 | Expired |
| US4064942A | Aquifer-plugging steam soak for layered reservoir | Fixed Constructions | 13 | Expired |
| US5108272A | Sucker rod pump | Fixed Constructions | 8 | Expired |
| US4476603A | Drainage seal for sewage system | Fixed Constructions | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.