Patent US2342395A successfully refreshed from Google Patents.
US1773411A
Expired / Lapsed
US
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Gyroscopic compass
Assignee: Sperry Gyroscope Co Inc
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Filing: 1920-01-15
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Granted: 1930-08-19
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Expires: 1940-01-15
Abstract
No abstract record available.
Inventors
- 👤 Herbert H Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:08
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1229; Y10T74/1232; Y10T74/1239
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) | 1933-08-18 | 1934-02-17 | 1934-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1937-08-18 | 1938-02-17 | 1938-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1941-08-18 | 1942-02-17 | 1942-08-19 | $7700.00 | Window Closed / Lapsed |