Patent US2707768A successfully refreshed from Google Patents.
US2707768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Geophysical exploration by electrical well logging
Assignee: Geophysical Research Corp
•
Filing: 1948-07-02
•
Granted: 1955-05-03
•
Expires: 1968-07-02
Abstract
No abstract record available.
Inventors
- 👤 John E Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:51
CPC Classifications
G; G01; G01V; G01V3/00; G01V3/18; G01V3/20; G01V3/24
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2036193A
Cited
US2191120A
Cited
US2401371A
Cited
US2251817A
Cited
US2206891A
Cited
US2246460A
Cited
US2446303A
Cited
US2605321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-02 | 1958-11-01 | 1959-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-02 | 1962-11-01 | 1963-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-02 | 1966-11-01 | 1967-05-03 | $7700.00 | Window Closed / Lapsed |