US2903244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil coolers for engines
Assignee: Rolls Royce PLC
•
Filing: 1956-04-02
•
Granted: 1959-09-08
•
Expires: 1976-04-02
Abstract
No abstract record available.
Inventors
- 👤 Brown William Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:46
CPC Classifications
F; F28; F28D; F28D7/00; F28D7/16; F28D7/1607
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2180840A
Cited
GB523245A
Cited
GB533767A
Cited
US2447970A
Cited
US2288127A
Cited
US2387057A
Cited
US2453737A
Cited
US2474689A
Cited
US2469316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |