Patent Explorer
Browse, filter, and analyze 43 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US3686224A | 2,6,7-trioxabicyclo(2.2.2)octane compounds | Gulf Research and Development Co | Expired / Lapsed | 1970-02-24 | 1972-08-22 | 1990-02-24 | 0.0 yrs | 0 | |
| US3132094A | Ultrafiltration of electrolyte solutions through ion-exchange memberanes | Gulf Research and Development Co | Expired / Lapsed | 1958-09-11 | 1964-05-05 | 1978-09-11 | 0.0 yrs | 2 | |
| US3009578A | Pre-stressed reinforced ion-exchange membrane and method of making same | Gulf Research and Development Co | Expired / Lapsed | 1958-04-15 | 1961-11-21 | 1978-04-15 | 0.0 yrs | 0 | |
| US2938650A | Fluid proportioning system | Gulf Research and Development Co | Expired / Lapsed | 1958-09-18 | 1960-05-31 | 1978-09-18 | 0.0 yrs | 0 | |
| US2912994A | Fluid proportioning valve | Gulf Research and Development Co | Expired / Lapsed | 1954-02-05 | 1959-11-17 | 1974-02-05 | 0.0 yrs | 0 | |
| US2884624A | Pipeline surveying | Gulf Research and Development Co | Expired / Lapsed | 1956-06-28 | 1959-04-28 | 1976-06-28 | 0.0 yrs | 0 | |
| US2851251A | Hammer drill | Gulf Research and Development Co | Expired / Lapsed | 1954-04-27 | 1958-09-09 | 1974-04-27 | 0.0 yrs | 0 | |
| US2785755A | Storm choke for oil wells | Gulf Research and Development Co | Expired / Lapsed | 1954-10-19 | 1957-03-19 | 1974-10-19 | 0.0 yrs | 0 | |
| US2774108A | Method of making low-resistance ion-exchange membranes | Gulf Research and Development Co | Expired / Lapsed | 1952-09-16 | 1956-12-18 | 1972-09-16 | 0.0 yrs | 2 | |
| US2737646A | Transient viewer and recorder | Gulf Research and Development Co | Expired / Lapsed | 1952-06-12 | 1956-03-06 | 1972-06-12 | 0.0 yrs | 0 | |
| US2688368A | System for the removal of corrosive fluids from gas wells | Gulf Research and Development Co | Expired / Lapsed | 1950-04-28 | 1954-09-07 | 1970-04-28 | 0.0 yrs | 2 | |
| US2608602A | Detecting device | Gulf Research and Development Co | Expired / Lapsed | 1946-08-09 | 1952-08-26 | 1966-08-09 | 0.0 yrs | 0 | |
| US2584785A | Process and apparatus for separation of mixtures | Gulf Research and Development Co | Expired / Lapsed | 1948-06-14 | 1952-02-05 | 1968-06-14 | 0.0 yrs | 2 | |
| US2581540A | Method of reducing corrosion in wells | Gulf Research and Development Co | Expired / Lapsed | 1948-09-02 | 1952-01-08 | 1968-09-02 | 0.0 yrs | 2 | |
| US2580182A | Subsurface flowmeter | Gulf Research and Development Co | Expired / Lapsed | 1947-05-01 | 1951-12-25 | 1967-05-01 | 0.0 yrs | 0 | |
| US2575568A | Centrifugal gas-liquid separator | Gulf Research and Development Co | Expired / Lapsed | 1946-11-12 | 1951-11-20 | 1966-11-12 | 0.0 yrs | 0 | |
| US2563083A | Hammer drill | Gulf Research and Development Co | Expired / Lapsed | 1948-10-28 | 1951-08-07 | 1968-10-28 | 0.0 yrs | 0 | |
| US2555209A | Method and apparatus for measuring the values of magnetic fields | Gulf Research and Development Co | Expired / Lapsed | 1943-11-01 | 1951-05-29 | 1963-11-01 | 0.0 yrs | 0 | |
| US2509321A | Rotary fluid unit for take-off under variable control | Gulf Research and Development Co | Expired / Lapsed | 1946-07-19 | 1950-05-30 | 1966-07-19 | 0.0 yrs | 0 | |
| US2488449A | Organo-silicon-phosphorus condensation products | Gulf Research and Development Co | Expired / Lapsed | 1946-09-11 | 1949-11-15 | 1966-09-11 | 0.0 yrs | 0 |
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