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Patent US2497091A successfully refreshed from Google Patents.
US2497091A
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Automatic piston stroke compensator for free piston engines
Assignee: LIMA HAMILTON CORP
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Filing: 1945-06-14
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Granted: 1950-02-14
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Expires: 1965-06-14
Abstract
No abstract record available.
Inventors
- 👤 Willard A Morain
- 👤 Paul S Shirley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:20
CPC Classifications
F; F02; F02B; F02B71/00; F01; F01B; F01B11/00; F02B75/00; F02B75/02; F02B2075/022; F02B2075/025
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) | 1953-02-13 | 1953-08-15 | 1954-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-13 | 1957-08-15 | 1958-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-13 | 1961-08-15 | 1962-02-14 | $7700.00 | Window Closed / Lapsed |