US2581834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impeller mounting
Assignee: RTX Corp
•
Filing: 1946-03-22
•
Granted: 1952-01-08
•
Expires: 1966-03-22
Abstract
No abstract record available.
Inventors
- 👤 Bertrand H Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:24
CPC Classifications
F; F02; F02B; F02B33/00; F02M; F02M2700/00; F02M2700/33; F02M2700/331; F02M2700/336
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US427060A
Cited
GB157480A
Cited
US1838799A
Cited
US2028360A
Cited
US2121299A
Cited
US2401206A
Cited
US2335508A
Cited
US2473061A
Cited
US2399072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-07 | 1955-07-09 | 1956-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-07 | 1959-07-09 | 1960-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-07 | 1963-07-09 | 1964-01-08 | $7700.00 | Window Closed / Lapsed |