Patent US2964657A successfully refreshed from Google Patents.
US2964657A
Expired / Lapsed
US
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Electronic commutator
Assignee: North American Aviation Corp
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Filing: 1958-06-13
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Granted: 1960-12-13
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Expires: 1978-06-13
Abstract
No abstract record available.
Inventors
- 👤 Robert K Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:31
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/02; H04J3/04; H04J3/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2404918A
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US2465355A
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US2627039A
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US2766379A
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US2844811A
Cited
US2833920A
Cited
US2825889A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |