Patent US1707690A successfully refreshed from Google Patents.
US1707690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic pilot for airplanes
Assignee: Sperry Gyroscope Co Inc
•
Filing: 1919-09-13
•
Granted: 1929-04-02
•
Expires: 1939-09-13
Abstract
No abstract record available.
Inventors
- 👤 Lawrence B Sperry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:46
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/02; B64C13/16; B64C13/18; G; G05; G05D; G05D1/00; G05D1/0055; G05D1/0061
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1932-04-01 | 1932-10-01 | 1933-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1936-04-01 | 1936-10-01 | 1937-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1940-04-01 | 1940-10-01 | 1941-04-02 | $7700.00 | Window Closed / Lapsed |