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US2503422A
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US
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Correcting pendulum grade-angle measurement
Assignee: Stanolind Oil and Gas Co
•
Filing: 1947-07-26
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Granted: 1950-04-11
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Expires: 1967-07-26
Abstract
No abstract record available.
Inventors
- 👤 Silverman Daniel
- 👤 Joseph D Eisler
- 👤 Julian F Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:04
CPC Classifications
G; G01; G01C; G01C7/00; G01C7/02; G01C7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22919E
Cited
US2362616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-04-10 | 1953-10-10 | 1954-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-04-10 | 1957-10-10 | 1958-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-04-10 | 1961-10-10 | 1962-04-11 | $7700.00 | Window Closed / Lapsed |