Patent US2427668A successfully refreshed from Google Patents.
US2427668A
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US
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Variable compression engine
Assignee: Individual
•
Filing: 1945-09-01
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Granted: 1947-09-23
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Expires: 1965-09-01
Abstract
No abstract record available.
Inventors
- 👤 Peter L Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:53
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/04; F02B75/045; F16; F16J; F16J1/00; F16J1/10; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32861
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1174459A
Cited
US2029169A
Cited
GB412781A
Cited
US2134995A
Cited
US2153691A
Cited
US2283022A
Cited
US2294105A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-22 | 1951-03-24 | 1951-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-22 | 1955-03-24 | 1955-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-22 | 1959-03-24 | 1959-09-23 | $7700.00 | Window Closed / Lapsed |