US2293293A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air pick-off for sensitive instruments
Assignee: Sperry Gyroscope Co Inc
•
Filing: 1938-06-01
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Granted: 1942-08-18
•
Expires: 1958-06-01
Abstract
No abstract record available.
Inventors
- 👤 William M Harcum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:00
CPC Classifications
G; G05; G05D; G05D1/00; G05D1/08; G05D1/0808; G01; G01C; G01C21/00; G01C21/10; G01C21/12; G01C21/16; G01C21/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1945-08-17 | 1946-02-16 | 1946-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-17 | 1950-02-16 | 1950-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-17 | 1954-02-16 | 1954-08-18 | $7700.00 | Window Closed / Lapsed |