US2659985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for pendulum compensating
Assignee: NORTH AMERICAN GEOPHYSICAL CO
•
Filing: 1947-08-16
•
Granted: 1953-11-24
•
Expires: 1967-08-16
Abstract
No abstract record available.
Inventors
- 👤 Raymond T Cloud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:52
CPC Classifications
G; G01; G01C; G01C9/00; G01C9/02; G01C9/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2313733A
Cited
US2242806A
Cited
US2362616A
Cited
US2552890A
Cited
US2458586A
Cited
US2524934A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |