US2983820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well logging apparatus
Assignee: Schlumberger Well Surveying Corp
•
Filing: 1954-03-08
•
Granted: 1961-05-09
•
Expires: 1974-03-08
Abstract
No abstract record available.
Inventors
- 👤 Arthur H Frentrop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:46
CPC Classifications
H; H05; H05H; H05H3/00; H05H3/06; G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10
Claims Analysis
Total Claims: 0
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US2689918A
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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) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |