Patent US2780912A successfully refreshed from Google Patents.
US2780912A
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Method and apparatus for varying the final compression temperature in a four cycle internal combustion engine
Assignee: Individual
•
Filing: 1951-08-17
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Granted: 1957-02-12
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Expires: 1971-08-17
Abstract
No abstract record available.
Inventors
- 👤 Miller Ralph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:24
CPC Classifications
F; F02; F02B; F02B41/00; F02D; F02D13/00; F02D13/02; F02D13/0223; F02D13/0234; F02D13/0269; F02D13/028; F02B1/00; F02B1/02; F02B1/04; F02B75/00; F02B75/02; F02B2075/022; F02B2075/027; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/32; F02B3/00; F02B3/06; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
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) | 1960-02-12 | 1960-08-13 | 1961-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-12 | 1964-08-13 | 1965-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-12 | 1968-08-13 | 1969-02-12 | $7700.00 | Window Closed / Lapsed |