Otis Engineering Corp
Otis EnginActive Patents
0
Total Holdings
32
Patent Holdings
Filter in Explorer →| Patent No. | Title | Status | Filing Date | Grant Date | Claims | Actions |
|---|---|---|---|---|---|---|
| GB774783A | Improvements in flow-control apparatus for two-zone wells | Expired / Lapsed | 1955-12-09 | — | 0 | Details |
| US4417470A | Electronic temperature sensor | Expired / Lapsed | 1981-09-30 | 1983-11-29 | 11 | Details |
| US4107697A | Pressure recorder with power conservation means | Expired / Lapsed | 1977-08-03 | 1978-08-15 | 15 | Details |
| US3878863A | Pilot valve system | Expired / Lapsed | 1973-05-07 | 1975-04-22 | 16 | Details |
| US3696868A | Well flow control valves and well systems utilizing the same | Expired / Lapsed | 1970-12-18 | 1972-10-10 | 28 | Details |
| US3675720A | Well flow control system and method | Expired / Lapsed | 1970-07-08 | 1972-07-11 | 21 | Details |
| US3543793A | Well tools | Expired / Lapsed | 1965-01-29 | 1970-12-01 | 0 | Details |
| US3411576A | Well tools | Expired / Lapsed | 1965-07-02 | 1968-11-19 | 0 | Details |
| US3398762A | Valves | Expired / Lapsed | 1965-10-21 | 1968-08-27 | 0 | Details |
| US3310114A | Pressure operated safety valve | Expired / Lapsed | 1964-07-01 | 1967-03-21 | 2 | Details |
| US3280914A | Method for controlling flow within a well | Expired / Lapsed | 1964-09-22 | 1966-10-25 | 2 | Details |
| US3233860A | Ball valve improvement | Expired / Lapsed | 1962-04-16 | 1966-02-08 | 2 | Details |
| US3208531A | Inserting tool for locating and anchoring a device in tubing | Expired / Lapsed | 1962-08-21 | 1965-09-28 | 1 | Details |
| US3157233A | Apparatus for controlling flow within a well | Expired / Lapsed | 1956-06-20 | 1964-11-17 | 2 | Details |
| US3102593A | Anchoring and sealing devices | Expired / Lapsed | 1959-09-09 | 1963-09-03 | 2 | Details |
| US3071188A | Remotely controlled latch for well tools | Expired / Lapsed | 1958-10-29 | 1963-01-01 | 2 | Details |
| US3025913A | Hydraulically actuatable anchor for well pipe | Expired / Lapsed | 1957-08-07 | 1962-03-20 | 0 | Details |
| US3022796A | Check valves | Expired / Lapsed | 1958-03-25 | 1962-02-27 | 0 | Details |
| US3008522A | Selective cross-over devices | Expired / Lapsed | 1954-09-07 | 1961-11-14 | 0 | Details |
| US3007669A | Valve | Expired / Lapsed | 1956-09-13 | 1961-11-07 | 0 | Details |
| US2963089A | Flow control apparatus | Expired / Lapsed | 1955-03-07 | 1960-12-06 | 0 | Details |
| US2942671A | Means for installing subsurface tools | Expired / Lapsed | 1958-06-30 | 1960-06-28 | 0 | Details |
| US2911997A | Pressure responsive valve | Expired / Lapsed | 1956-07-23 | 1959-11-10 | 0 | Details |
| US2908330A | Well tubing extension hanger and plug | Expired / Lapsed | 1954-04-27 | 1959-10-13 | 0 | Details |
| US2894715A | Valve | Expired / Lapsed | 1956-09-05 | 1959-07-14 | 0 | Details |
| US2894586A | Well tools | Expired / Lapsed | 1955-02-02 | 1959-07-14 | 0 | Details |
| US2833306A | Check valve | Expired / Lapsed | 1955-06-10 | 1958-05-06 | 0 | Details |
| US2828698A | Gas lift valve assembly | Expired / Lapsed | 1957-04-09 | 1958-04-01 | 0 | Details |
| US2814348A | Extensible means for circulating fluids through wells | Expired / Lapsed | 1953-08-10 | 1957-11-26 | 0 | Details |
| US2698056A | Well device | Expired / Lapsed | 1952-03-24 | 1954-12-28 | 0 | Details |
| US2673614A | Anchoring assembly for oil tools | Expired / Lapsed | 1949-10-14 | 1954-03-30 | 0 | Details |
| US2508286A | Retrieving tool | Expired / Lapsed | 1945-12-15 | 1950-05-16 | 0 | Details |