Patent US2637369A successfully refreshed from Google Patents.
US2637369A
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US
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Assignee: North American Aviation Corp
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Filing: 1950-02-02
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Granted: 1953-05-05
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Expires: 1970-02-02
Abstract
No abstract record available.
Inventors
- 👤 Charles W Demarest
- 👤 John T Willoughby
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:41
CPC Classifications
B; B64; B64D; B64D11/00; B64D11/06; B64D11/0689; B60; B60N; B60N2/00; B60N2/02; B60N2/04; B60N2/16; B60N2/1605; B60N2/163; B60N2/1675; B60N2/1685; B60N2/169
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) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |