US2947929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital-analog servo circuit
Assignee: North American Aviation Corp
•
Filing: 1955-12-23
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Granted: 1960-08-02
•
Expires: 1975-12-23
Abstract
No abstract record available.
Inventors
- 👤 John L Bower
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:17
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/1436; H; H03; H03M; H03M1/00; H03M1/12; H03M1/48; H03M1/485; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/300896
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2537427A
Cited
US2728882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |