US2594761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Rolls Royce PLC
•
Filing: 1947-12-29
•
Granted: 1952-04-29
•
Expires: 1967-12-29
Abstract
No abstract record available.
Inventors
- 👤 Fletcher Arthur Holmes
- 👤 Stark Frank Henry
- 👤 Corbitt Robert William
- 👤 Sherlaw William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:13
CPC Classifications
F; F28; F28F; F28F9/00; F28D; F28D7/00; F28D7/16; F28D7/163; F28D7/1669; Y; Y10; Y10S; Y10S165/00; Y10S165/051; Y10S165/052; Y10S165/067; Y10S165/068
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US267797A
Cited
US1335506A
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US1649120A
Cited
US1779719A
Cited
US2207936A
Cited
US2285651A
Cited
US2481547A
Cited
US2396235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-29 | 1955-10-29 | 1956-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-29 | 1959-10-29 | 1960-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-29 | 1963-10-29 | 1964-04-29 | $7700.00 | Window Closed / Lapsed |