Pure Oil Co
Pure Oil CActive Patents
0
Total Holdings
11
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US2994219A | Corrosion test probe | Expired / Lapsed | 1957-11-15 | 1961-08-01 | 0 | Details |
| US2921210A | Hydrogen diffusion detection apparatus | Expired / Lapsed | 1957-09-30 | 1960-01-12 | 2 | Details |
| US2912139A | Drum stacking ring | Expired / Lapsed | 1955-03-30 | 1959-11-10 | 0 | Details |
| US2830265A | Electronic resistance-change meter | Expired / Lapsed | 1955-08-12 | 1958-04-08 | 0 | Details |
| US2824283A | Corrosion meter | Expired / Lapsed | 1956-12-31 | 1958-02-18 | 0 | Details |
| US2724267A | Method for measuring flow of fluid in earth bores | Expired / Lapsed | 1948-08-26 | 1955-11-22 | 2 | Details |
| US2510771A | Method of protecting metal surfaces against hydrogen sulfid… | Expired / Lapsed | 1946-11-01 | 1950-06-06 | 2 | Details |
| US2330933A | Drilling apparatus | Expired / Lapsed | 1940-11-20 | 1943-10-05 | 0 | Details |
| US2157223A | Method for sweetening hydrocarbon oils | Expired / Lapsed | 1935-06-17 | 1939-05-09 | 0 | Details |
| US2090333A | Method of making lubricating oil | Expired / Lapsed | 1935-06-27 | 1937-08-17 | 0 | Details |
| US1811195A | Method of treating petroleum oil | Expired / Lapsed | 1927-02-09 | 1931-06-23 | 0 | Details |