Patent US1959804A successfully refreshed from Google Patents.
US1959804A
Expired / Lapsed
US
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Noncontacting follow-up system
Assignee: Sperry Gyroscope Co Inc
•
Filing: 1929-07-27
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Granted: 1934-05-22
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Expires: 1949-07-27
Abstract
No abstract record available.
Inventors
- 👤 Wittkuhns Bruno
- 👤 Frederic M Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:19
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/32; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261
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) | 1937-05-21 | 1937-11-20 | 1938-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-21 | 1941-11-20 | 1942-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-21 | 1945-11-20 | 1946-05-22 | $7700.00 | Window Closed / Lapsed |