Patent Explorer
Browse, filter, and analyze 47 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US5096001A | MWD tool for deep, small diameter boreholes | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1991-03-18 | 1992-03-17 | 2011-03-18 | 0.0 yrs | 22 | |
| US4710708A | Method and apparatus employing received independent magnetic field components of a transmitted alternating magnetic field for determining location | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1982-07-23 | 1987-12-01 | 2002-07-23 | 0.0 yrs | 31 | |
| US4493373A | Dynamic seal for well tools | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1983-08-15 | 1985-01-15 | 2003-08-15 | 0.0 yrs | 13 | |
| US3967201A | Wireless subterranean signaling method | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1974-01-25 | 1976-06-29 | 1994-01-25 | 0.0 yrs | 34 | |
| US3870101A | Removable subsea production test valve assembly | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1973-04-25 | 1975-03-11 | 1993-04-25 | 0.0 yrs | 49 | |
| US3703213A | Mud saver apparatus | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1970-10-21 | 1972-11-21 | 1990-10-21 | 0.0 yrs | 13 | |
| US3371717A | Multiple zone well production apparatus | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1965-09-21 | 1968-03-05 | 1985-09-21 | 0.0 yrs | 0 | |
| US3351133A | Tubing weight-controlled safety valve apparatus | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1965-06-14 | 1967-11-07 | 1985-06-14 | 0.0 yrs | 2 | |
| US3233674A | Subsurface well apparatus | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1963-07-22 | 1966-02-08 | 1983-07-22 | 0.0 yrs | 2 | |
| US3136364A | Hydraulically set well packer | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1961-03-30 | 1964-06-09 | 1981-03-30 | 0.0 yrs | 2 | |
| US3081061A | Piston valve seal | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1960-03-28 | 1963-03-12 | 1980-03-28 | 0.0 yrs | 2 | |
| US3016914A | Drill pipe float valves | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1958-11-14 | 1962-01-16 | 1978-11-14 | 0.0 yrs | 0 | |
| US3008523A | Retrievable well packer and anchor | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1958-07-25 | 1961-11-14 | 1978-07-25 | 0.0 yrs | 0 | |
| US2974922A | Tubing control valve apparatus | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1957-09-30 | 1961-03-14 | 1977-09-30 | 0.0 yrs | 0 | |
| US2874784A | Tubing anchor | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1955-10-17 | 1959-02-24 | 1975-10-17 | 0.0 yrs | 0 | |
| US2853265A | Telescopic valve apparatus for testing well bore tubing | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1955-08-12 | 1958-09-23 | 1975-08-12 | 0.0 yrs | 0 | |
| US2799346A | Retrievable bridge plug | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1953-10-12 | 1957-07-16 | 1973-10-12 | 0.0 yrs | 0 | |
| US2778428A | Releasable apparatus for retrieving subsurface well devices | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1953-10-12 | 1957-01-22 | 1973-10-12 | 0.0 yrs | 0 | |
| US2768695A | Apparatus for controllably filling well casing | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1953-04-27 | 1956-10-30 | 1973-04-27 | 0.0 yrs | 0 | |
| US2750958A | Drill pipe float valve | Baker Hughes Oilfield Operations LLC | Expired / Lapsed | 1953-04-27 | 1956-06-19 | 1973-04-27 | 0.0 yrs | 2 |
Showing 1 to 20 of 47 patents
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