OIL CENTER TOOL CO
OIL CENTERActive Patents
0
Total Holdings
10
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2634754A | Pilot controlled fluid pressure operated valve | Expired / Lapsed | 1948-12-27 | 1953-04-14 | 0 | Details |
| US2633918A | Well packer and anchoring means therefor | Expired / Lapsed | 1950-09-02 | 1953-04-07 | 0 | Details |
| US2610689A | Wellhead seal | Expired / Lapsed | 1946-08-19 | 1952-09-16 | 0 | Details |
| US2589483A | Wellhead | Expired / Lapsed | 1946-04-06 | 1952-03-18 | 0 | Details |
| US2540455A | Hydraulic packer setting assembly | Expired / Lapsed | 1946-06-27 | 1951-02-06 | 0 | Details |
| US2532669A | Balanced thrust swivel joint | Expired / Lapsed | 1947-05-19 | 1950-12-05 | 0 | Details |
| US2488931A | Producing equipment for wells | Expired / Lapsed | 1944-12-16 | 1949-11-22 | 0 | Details |
| US2480955A | Joint sealing means for well heads | Expired / Lapsed | 1945-10-29 | 1949-09-06 | 0 | Details |
| US2456081A | Well-head seal | Expired / Lapsed | 1945-11-02 | 1948-12-14 | 0 | Details |
| US2426743A | Circulating well head | Expired / Lapsed | 1943-06-24 | 1947-09-02 | 0 | Details |