Patent Explorer
Browse, filter, and analyze 11 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US4034808A | Method for pump-off detection | Shell USA Inc | Expired / Lapsed | 1976-09-20 | 1977-07-12 | 1996-09-20 | 0.0 yrs | 9 | |
| US4008603A | Ultrasonic method and apparatus for measuring wall thickness of tubular members | Shell USA Inc | Expired / Lapsed | 1975-12-29 | 1977-02-22 | 1995-12-29 | 0.0 yrs | 7 | |
| US3951209A | Method for determining the pump-off of a well | Shell USA Inc | Expired / Lapsed | 1975-06-09 | 1976-04-20 | 1995-06-09 | 0.0 yrs | 5 | |
| US3549868A | Fuel-mileage computer | Shell USA Inc | Expired / Lapsed | 1966-06-23 | 1970-12-22 | 1986-06-23 | 0.0 yrs | 0 | |
| US3343409A | Method of determining sucker rod pump performance | Shell USA Inc | Expired / Lapsed | 1966-10-21 | 1967-09-26 | 1986-10-21 | 0.0 yrs | 2 | |
| US3199595A | Secondary control system for underwater wells | Shell USA Inc | Expired / Lapsed | 1961-12-28 | 1965-08-10 | 1981-12-28 | 0.0 yrs | 2 | |
| US3163222A | Wellhead apparatus | Shell USA Inc | Expired / Lapsed | 1961-04-24 | 1964-12-29 | 1981-04-24 | 0.0 yrs | 1 | |
| US3116170A | Gaseous fuel cells | Shell USA Inc | Expired / Lapsed | 1960-06-06 | 1963-12-31 | 1980-06-06 | 0.0 yrs | 2 | |
| US3101118A | Y-branched wellhead assembly | Shell USA Inc | Expired / Lapsed | 1959-08-17 | 1963-08-20 | 1979-08-17 | 0.0 yrs | 2 | |
| US3053903A | Production of high molecular weight polyoxyalkylene compounds | Shell USA Inc | Expired / Lapsed | 1958-12-09 | 1962-09-11 | 1978-12-09 | 0.0 yrs | 2 | |
| US2970983A | Epoxy-containing condensates of polyepoxides and acidic materials, their preparation and polymers | Shell USA Inc | Expired / Lapsed | 1956-09-10 | 1961-02-07 | 1976-09-10 | 0.0 yrs | 2 |