Patent Explorer
Browse, filter, and analyze 12 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2707440A | Oil well pump control system | Shell Development Co | Expired / Lapsed | 1951-07-21 | 1955-05-03 | 1971-07-21 | 0.0 yrs | 0 | |
| US2665885A | Apparatus for offshore coring | Shell Development Co | Expired / Lapsed | 1948-10-25 | 1954-01-12 | 1968-10-25 | 0.0 yrs | 0 | |
| US2629649A | Vapor-phase corrosion inhibitor | Shell Development Co | Expired / Lapsed | 1949-10-31 | 1953-02-24 | 1969-10-31 | 0.0 yrs | 0 | |
| US2616020A | Automatic temperature control | Shell Development Co | Expired / Lapsed | 1950-03-07 | 1952-10-28 | 1970-03-07 | 0.0 yrs | 0 | |
| US2564422A | Corrosion preventive composition | Shell Development Co | Expired / Lapsed | 1947-04-28 | 1951-08-14 | 1967-04-28 | 0.0 yrs | 2 | |
| US2550093A | Oil well control system | Shell Development Co | Expired / Lapsed | 1949-03-15 | 1951-04-24 | 1969-03-15 | 0.0 yrs | 0 | |
| US2353484A | Seismic exploration method | Shell Development Co | Expired / Lapsed | 1942-01-05 | 1944-07-11 | 1962-01-05 | 0.0 yrs | 0 | |
| US2351322A | Bottom hole regulator | Shell Development Co | Expired / Lapsed | 1942-01-13 | 1944-06-13 | 1962-01-13 | 0.0 yrs | 0 | |
| US2326442A | Gas-lift control | Shell Development Co | Expired / Lapsed | 1941-08-05 | 1943-08-10 | 1961-08-05 | 0.0 yrs | 0 | |
| US2297666A | Internal corrosion prevention in conduits | Shell Development Co | Expired / Lapsed | 1940-03-09 | 1942-09-29 | 1960-03-09 | 0.0 yrs | 0 | |
| US2282712A | Recovery of hydrogen halides | Shell Development Co | Expired / Lapsed | 1940-04-30 | 1942-05-12 | 1960-04-30 | 0.0 yrs | 0 | |
| US2118454A | Process for separating high molecular mixtures of the ester type | Shell Development Co | Expired / Lapsed | 1936-03-24 | 1938-05-24 | 1956-03-24 | 0.0 yrs | 0 |