US3444549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotational shaft encoder having provisions for phase adjustment of contacts during operation
Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1965-05-04
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Granted: 1969-05-13
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Expires: 1985-05-04
Abstract
No abstract record available.
Inventors
- 👤 David H Margolien
- 👤 Arnold St J Lee
- 👤 Niels Krag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:39
CPC Classifications
G; G01; G01C; G01C19/00; G01C19/02; G01C19/34; G01C19/38; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22; H03M1/24; H03M1/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-05-12 | 1972-11-11 | 1973-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-05-12 | 1976-11-11 | 1977-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-05-12 | 1980-11-11 | 1981-05-13 | $7700.00 | Window Closed / Lapsed |