Richfield Oil Corp
RichfieldActive Patents
0
Total Holdings
9
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3279539A | Well casing hanger and method for hanging same | Expired / Lapsed | 1965-02-12 | 1966-10-18 | 2 | Details |
| US3236301A | Drilling and production apparatus and method | Expired / Lapsed | 1961-07-10 | 1966-02-22 | 2 | Details |
| US3219117A | Well drilling and production apparatus and method | Expired / Lapsed | 1961-07-10 | 1965-11-23 | 1 | Details |
| US3004602A | Underwater oil well completion | Expired / Lapsed | 1956-11-05 | 1961-10-17 | 2 | Details |
| US2917281A | Releasing head for submarine conductor casing | Expired / Lapsed | 1957-07-26 | 1959-12-15 | 0 | Details |
| US2543741A | Lubricating and sealing composition of flake copper, powder… | Expired / Lapsed | 1948-12-02 | 1951-02-27 | 2 | Details |
| US2447629A | Apparatus for forming a section of casing below casing alre… | Expired / Lapsed | 1944-05-23 | 1948-08-24 | 0 | Details |
| US2342656A | Well treating fluid | Expired / Lapsed | 1941-10-01 | 1944-02-29 | 0 | Details |
| US2272610A | Tong handle torque indicator | Expired / Lapsed | 1940-10-19 | 1942-02-10 | 0 | Details |