Pure Oil Co
Pure Oil CActive Patents
0
Total Holdings
33
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| US3192473A | Method and apparatus for detecting changes in composition o… | Expired / Lapsed | 1960-12-05 | 1965-06-29 | 1 | Details |
| US3087545A | Method of heating and producing oil wells | Expired / Lapsed | 1961-08-09 | 1963-04-30 | 2 | Details |
| US3079343A | Antifreeze composition containing an indicator material | Expired / Lapsed | 1960-09-07 | 1963-02-26 | 2 | Details |
| US3062043A | Stress-measuring device | Expired / Lapsed | 1958-09-16 | 1962-11-06 | 0 | Details |
| US3047847A | Device for remotely indicating corrosion | Expired / Lapsed | 1958-12-12 | 1962-07-31 | 0 | Details |
| 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 |
| US2900392A | Preparation of dithianes | Expired / Lapsed | 1955-12-20 | 1959-08-18 | 2 | Details |
| US2864252A | Corrosion testing probe | Expired / Lapsed | 1956-12-19 | 1958-12-16 | 0 | Details |
| US2850901A | Differential pressure indicator | Expired / Lapsed | 1953-12-28 | 1958-09-09 | 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 |
| US2662408A | Electronic pressure indicator | Expired / Lapsed | 1947-10-18 | 1953-12-15 | 0 | Details |
| US2574576A | Prevention of corrosion of steel by brine containing dissol… | Expired / Lapsed | 1949-10-12 | 1951-11-13 | 2 | Details |
| US2537942A | Distilling head | Expired / Lapsed | 1947-07-16 | 1951-01-09 | 0 | Details |
| US2510771A | Method of protecting metal surfaces against hydrogen sulfid… | Expired / Lapsed | 1946-11-01 | 1950-06-06 | 2 | Details |
| US2508292A | Sulfur vaporization | Expired / Lapsed | 1945-04-21 | 1950-05-16 | 2 | Details |
| US2480470A | Thermostatically controlled bath | Expired / Lapsed | 1946-06-01 | 1949-08-30 | 0 | Details |
| US2428727A | Carbon disulfide process | Expired / Lapsed | 1942-12-26 | 1947-10-07 | 0 | Details |
| US2354892A | Dehydrogenation of hydrocarbons | Expired / Lapsed | 1937-12-18 | 1944-08-01 | 0 | Details |
| US2330933A | Drilling apparatus | Expired / Lapsed | 1940-11-20 | 1943-10-05 | 0 | Details |
| US2330934A | Sulphur oxidation of hydrocarbons | Expired / Lapsed | 1939-09-11 | 1943-10-05 | 0 | Details |
| US2291522A | Heating oils | Expired / Lapsed | 1940-07-29 | 1942-07-28 | 0 | Details |
| US2225709A | Apparatus for determining the motion of well drilling tools | Expired / Lapsed | 1937-12-13 | 1940-12-24 | 0 | Details |
| US2163665A | Well drilling indicator | Expired / Lapsed | 1936-07-15 | 1939-06-27 | 0 | Details |
| US2157223A | Method for sweetening hydrocarbon oils | Expired / Lapsed | 1935-06-17 | 1939-05-09 | 0 | Details |
| US2152779A | Method and apparatus for waterdrive production of mineral o… | Expired / Lapsed | 1937-07-06 | 1939-04-04 | 0 | Details |
| US2136261A | Plunger type fluid indicator and metering device | Expired / Lapsed | 1936-03-02 | 1938-11-08 | 0 | Details |
| US2090333A | Method of making lubricating oil | Expired / Lapsed | 1935-06-27 | 1937-08-17 | 0 | Details |
| US2045945A | Fluid motor | Expired / Lapsed | 1932-06-23 | 1936-06-30 | 0 | Details |
| US1811195A | Method of treating petroleum oil | Expired / Lapsed | 1927-02-09 | 1931-06-23 | 0 | Details |