US2431857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of operating internalcombustion engines
Assignee: Texaco Inc
•
Filing: 1943-12-31
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Granted: 1947-12-02
•
Expires: 1963-12-31
Abstract
No abstract record available.
Inventors
- 👤 William N Fenney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:22
CPC Classifications
F; F02; F02M; F02M69/00; F02M69/04; F02M69/042; F02M69/045; F02B; F02B23/00; F02B23/08; F02B23/10; F02B23/104; F02B23/105; F02B3/00; F02B3/02; F02M53/00; F02M53/02; F02B75/00; F02B75/12; F02B2075/125; F02B2275/00; F02B2275/42; F02D; F02D41/00; F02D41/0002; F02D2041/0015; F02P; F02P5/00; F02P5/04; F02P5/045; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1305579A
Cited
US1167376A
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FR600008A
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AT113026B
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US1834061A
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US2012086A
Cited
US2003814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |