Patent US3051815A successfully refreshed from Google Patents.
US3051815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase controlled servo system
Assignee: North American Aviation Corp
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Filing: 1959-09-30
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Granted: 1962-08-28
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Expires: 1979-09-30
Abstract
No abstract record available.
Inventors
- 👤 Russell E Hukee
- 👤 Laurence H Dunklee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2553060A
Cited
US2652460A
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US2729396A
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US2761052A
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US2805311A
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US2957111A
Cited
US2975260A
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US2958008A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |