Patent Explorer
Browse, filter, and analyze 13 patents across global jurisdictions.
| Patent Number | Title | Assignee | Status | Filing Date | Grant Date | Expires | Remaining | Claims | Actions |
|---|---|---|---|---|---|---|---|---|---|
| US2754475A | Borehole diameter and lateral depth of fluid invasion indicator | Lane Wells Co | Expired / Lapsed | 1949-01-28 | 1956-07-10 | 1969-01-28 | 0.0 yrs | 2 | |
| US2701334A | Electrical logging of well bores | Lane Wells Co | Expired / Lapsed | 1953-06-16 | 1955-02-01 | 1973-06-16 | 0.0 yrs | 0 | |
| US2446527A | Phase shift logging of well bores | Lane Wells Co | Expired / Lapsed | 1942-03-28 | 1948-08-10 | 1962-03-28 | 0.0 yrs | 0 | |
| US2393009A | Electrical well logging method and apparatus | Lane Wells Co | Expired / Lapsed | 1942-11-03 | 1946-01-15 | 1962-11-03 | 0.0 yrs | 0 | |
| US2358441A | Inductive-capacitive electrical logging | Lane Wells Co | Expired / Lapsed | 1941-07-12 | 1944-09-19 | 1961-07-12 | 0.0 yrs | 0 | |
| US2338991A | Magnetic well logging | Lane Wells Co | Expired / Lapsed | 1940-10-19 | 1944-01-11 | 1960-10-19 | 0.0 yrs | 0 | |
| US2307983A | Selective production means for wells | Lane Wells Co | Expired / Lapsed | 1940-01-22 | 1943-01-12 | 1960-01-22 | 0.0 yrs | 0 | |
| US2288876A | Magnetic logging | Lane Wells Co | Expired / Lapsed | 1941-01-21 | 1942-07-07 | 1961-01-21 | 0.0 yrs | 0 | |
| US2265978A | Alternating current electrologging of well bores | Lane Wells Co | Expired / Lapsed | 1939-10-04 | 1941-12-16 | 1959-10-04 | 0.0 yrs | 0 | |
| US2255754A | Multiple record electrologging of wells | Lane Wells Co | Expired / Lapsed | 1939-03-08 | 1941-09-16 | 1959-03-08 | 0.0 yrs | 0 | |
| US2191765A | Temperature indicator for wells | Lane Wells Co | Expired / Lapsed | 1938-07-02 | 1940-02-27 | 1958-07-02 | 0.0 yrs | 0 | |
| US2142555A | Automatic compensator for geophysical devices | Lane Wells Co | Expired / Lapsed | 1936-01-13 | 1939-01-03 | 1956-01-13 | 0.0 yrs | 0 | |
| US2133776A | Subsurface prospecting device | Lane Wells Co | Expired / Lapsed | 1936-02-18 | 1938-10-18 | 1956-02-18 | 0.0 yrs | 0 |