US2959241A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for investigating earth formations
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1955-12-08
•
Granted: 1960-11-08
•
Expires: 1975-12-08
Abstract
No abstract record available.
Inventors
- 👤 Frank P Kokesh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:13
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/40; G01V1/52
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-08 | 1964-05-09 | 1964-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-08 | 1968-05-09 | 1968-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-08 | 1972-05-09 | 1972-11-08 | $7700.00 | Window Closed / Lapsed |