Patent US2763786A successfully refreshed from Google Patents.
Patent US2657901A successfully refreshed from Google Patents.
US2657901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Construction of turbine rotors
Assignee: Power Jets Research and Development Ltd
•
Filing: 1946-06-04
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Granted: 1953-11-03
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Expires: 1966-06-04
Abstract
No abstract record available.
Inventors
- 👤 Mcleod Roderick Cristall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:56
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/06; F01D5/066; F01D5/08; F01D5/081; F01D5/082; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-02 | 1957-05-04 | 1957-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-02 | 1961-05-04 | 1961-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-02 | 1965-05-04 | 1965-11-03 | $7700.00 | Window Closed / Lapsed |