US3023371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Precision variable frequency generator
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1958-03-07
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Granted: 1962-02-27
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Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
- 👤 Frank R Balish
- 👤 Paul H Mcgarrell
- 👤 Charles C Miller
- 👤 Arthur F Naylor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:31
CPC Classifications
H; H03; H03B; H03B21/00; H03B21/01; H03B21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB641344A
Cited
US2666141A
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US2490500A
Cited
US2813977A
Cited
US2478973A
Cited
US2749442A
Cited
US2816229A
Cited
US2848616A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-26 | 1965-08-28 | 1966-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-26 | 1969-08-28 | 1970-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-26 | 1973-08-28 | 1974-02-27 | $7700.00 | Window Closed / Lapsed |