Oil Well Supply Co
Oil Well SActive Patents
0
Total Holdings
14
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2559659A | Pump valve | Expired / Lapsed | 1949-03-07 | 1951-07-10 | 0 | Details |
| US2395415A | Skid base for machinery and the like | Expired / Lapsed | 1944-11-18 | 1946-02-26 | 0 | Details |
| US2390601A | Blowout seal for well drilling rotaries | Expired / Lapsed | 1943-08-26 | 1945-12-11 | 0 | Details |
| US2306739A | Locking mechanism for well drilling rotary | Expired / Lapsed | 1941-04-24 | 1942-12-29 | 0 | Details |
| US2258267A | High speed thrust bearing | Expired / Lapsed | 1940-01-03 | 1941-10-07 | 0 | Details |
| US2163472A | Valve | Expired / Lapsed | 1936-07-07 | 1939-06-20 | 0 | Details |
| US2049830A | Process of straightening and testing long metal articles | Expired / Lapsed | 1932-10-27 | 1936-08-04 | 0 | Details |
| US2023930A | Flow packer | Expired / Lapsed | 1932-04-04 | 1935-12-10 | 0 | Details |
| US1971713A | Pump valve | Expired / Lapsed | 1929-07-30 | 1934-08-28 | 0 | Details |
| US1968200A | Pump valve | Expired / Lapsed | 1929-07-26 | 1934-07-31 | 0 | Details |
| US1785277A | Oil-well packer | Expired / Lapsed | 1927-07-06 | 1930-12-16 | 0 | Details |
| US1745304A | Float coupling | Expired / Lapsed | 1925-08-25 | 1930-01-28 | 0 | Details |
| US1300956A | Hose-coupling nozzle and clamp. | Expired / Lapsed | 1918-04-30 | 1919-04-15 | 0 | Details |
| US1248881A | Oil-well packer. | Expired / Lapsed | 1915-11-23 | 1917-12-04 | 0 | Details |