US1692385A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cooling device for the cylinders of internal-combustion engines
Assignee: Rolls Royce PLC
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Filing: 1926-07-31
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Granted: 1928-11-20
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Expires: 1946-07-31
Abstract
No abstract record available.
Inventors
- 👤 Royce Frederick Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:45
CPC Classifications
F; F02; F02F; F02F1/00; F02F1/24; F02F1/242; F02F1/002; F02F1/02; F02F1/10; F02F1/14; F02F1/42; F02F1/4214; F02B; F02B1/00; F02B1/02; F02B1/04; F02B23/00; F02B23/08; F02B2023/085; F02F2001/244; F02F2001/247
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1931-11-20 | 1932-05-21 | 1932-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-11-20 | 1936-05-21 | 1936-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-11-20 | 1940-05-21 | 1940-11-20 | $7700.00 | Window Closed / Lapsed |