US2926644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston
Assignee: Individual
•
Filing: 1957-07-26
•
Granted: 1960-03-01
•
Expires: 1977-07-26
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Flamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:09
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/34; F02F; F02F3/00; F02F3/24; F02B75/02; F02B2075/022; F02B2075/025; F02B3/00; F02B3/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1789089A
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US2119121A
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US2122677A
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DE671028C
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DE680906C
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DE894635C
Cited
US2447508A
Cited
US2445715A
Cited
US2516031A
Cited
GB674534A
Cited
US2823085A
Cited
US2819936A
Cited
US2815993A
Cited
US2838035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-01 | 1963-08-31 | 1964-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-01 | 1967-08-31 | 1968-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-01 | 1971-08-31 | 1972-03-01 | $7700.00 | Window Closed / Lapsed |