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Browse, filter, and analyze 32 patents across global jurisdictions.

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Patent Number Title Assignee Status Filing Date Grant Date Expires Remaining Claims Actions
GB774783A Improvements in flow-control apparatus for two-zone wells Otis Engineering Corp Expired / Lapsed 1955-12-09 — 1975-12-09 0.0 yrs 0
US4417470A Electronic temperature sensor Otis Engineering Corp Expired / Lapsed 1981-09-30 1983-11-29 2001-09-30 0.0 yrs 11
US4107697A Pressure recorder with power conservation means Otis Engineering Corp Expired / Lapsed 1977-08-03 1978-08-15 1997-08-03 0.0 yrs 15
US3878863A Pilot valve system Otis Engineering Corp Expired / Lapsed 1973-05-07 1975-04-22 1993-05-07 0.0 yrs 16
US3696868A Well flow control valves and well systems utilizing the same Otis Engineering Corp Expired / Lapsed 1970-12-18 1972-10-10 1990-12-18 0.0 yrs 28
US3675720A Well flow control system and method Otis Engineering Corp Expired / Lapsed 1970-07-08 1972-07-11 1990-07-08 0.0 yrs 21
US3543793A Well tools Otis Engineering Corp Expired / Lapsed 1965-01-29 1970-12-01 1985-01-29 0.0 yrs 0
US3411576A Well tools Otis Engineering Corp Expired / Lapsed 1965-07-02 1968-11-19 1985-07-02 0.0 yrs 0
US3398762A Valves Otis Engineering Corp Expired / Lapsed 1965-10-21 1968-08-27 1985-10-21 0.0 yrs 0
US3310114A Pressure operated safety valve Otis Engineering Corp Expired / Lapsed 1964-07-01 1967-03-21 1984-07-01 0.0 yrs 2
US3280914A Method for controlling flow within a well Otis Engineering Corp Expired / Lapsed 1964-09-22 1966-10-25 1984-09-22 0.0 yrs 2
US3233860A Ball valve improvement Otis Engineering Corp Expired / Lapsed 1962-04-16 1966-02-08 1982-04-16 0.0 yrs 2
US3208531A Inserting tool for locating and anchoring a device in tubing Otis Engineering Corp Expired / Lapsed 1962-08-21 1965-09-28 1982-08-21 0.0 yrs 1
US3157233A Apparatus for controlling flow within a well Otis Engineering Corp Expired / Lapsed 1956-06-20 1964-11-17 1976-06-20 0.0 yrs 2
US3102593A Anchoring and sealing devices Otis Engineering Corp Expired / Lapsed 1959-09-09 1963-09-03 1979-09-09 0.0 yrs 2
US3071188A Remotely controlled latch for well tools Otis Engineering Corp Expired / Lapsed 1958-10-29 1963-01-01 1978-10-29 0.0 yrs 2
US3025913A Hydraulically actuatable anchor for well pipe Otis Engineering Corp Expired / Lapsed 1957-08-07 1962-03-20 1977-08-07 0.0 yrs 0
US3022796A Check valves Otis Engineering Corp Expired / Lapsed 1958-03-25 1962-02-27 1978-03-25 0.0 yrs 0
US3008522A Selective cross-over devices Otis Engineering Corp Expired / Lapsed 1954-09-07 1961-11-14 1974-09-07 0.0 yrs 0
US3007669A Valve Otis Engineering Corp Expired / Lapsed 1956-09-13 1961-11-07 1976-09-13 0.0 yrs 0
Showing 1 to 20 of 32 patents
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