US2931341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Store election piston with gas return
Assignee: North American Aviation Corp
•
Filing: 1957-01-07
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Granted: 1960-04-05
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Expires: 1977-01-07
Abstract
No abstract record available.
Inventors
- 👤 Harry M Meadows
- 👤 John C Steinmetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:05
CPC Classifications
B; B64; B64D; B64D1/00; B64D1/02; B64D1/04; B64D1/06; F; F15; F15B; F15B11/00; F15B11/06; F15B15/00; F15B15/08; F15B15/14; F15B15/16; F42; F42B; F42B3/00; F42B3/006; F15B2211/00; F15B2211/20; F15B2211/21; F15B2211/212; F15B2211/30; F15B2211/305; F15B2211/30505; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/70; F15B2211/705; F15B2211/7051; F15B2211/7057; F15B2211/72; F15B2211/77; F15B2211/7716
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR897102A
Cited
FR1003250A
Cited
US2730401A
Cited
US2703558A
Cited
US2746425A
Cited
US2736522A
Cited
US2749063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |