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US2640745A
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US
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Assignee: North American Aviation Corp
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Filing: 1950-08-07
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Granted: 1953-06-02
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Expires: 1970-08-07
Abstract
No abstract record available.
Inventors
- 👤 Louis S Wait
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:45
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/02; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1437869A
Cited
US2149388A
Cited
US2180795A
Cited
GB522897A
Cited
US2332786A
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US2314683A
Cited
US2447340A
Cited
US2527022A
Cited
US2437586A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |