US1999646A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light or ray controlled follow-up system
Assignee: Sperry Gyroscope Co Inc
•
Filing: 1932-01-18
•
Granted: 1935-04-30
•
Expires: 1952-01-18
Abstract
No abstract record available.
Inventors
- 👤 Bruno A Wittkuhns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:56
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261; Y10T74/1264
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) | 1938-04-29 | 1938-10-29 | 1939-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-04-29 | 1942-10-29 | 1943-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-04-29 | 1946-10-29 | 1947-04-30 | $7700.00 | Window Closed / Lapsed |