Patent US2654565A successfully refreshed from Google Patents.
US2654565A
Expired / Lapsed
US
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Construction of rotors for compressors and like machines
Assignee: Power Jets Research and Development Ltd
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Filing: 1948-03-04
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Granted: 1953-10-06
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Expires: 1968-03-04
Abstract
No abstract record available.
Inventors
- 👤 Feilden Geoffrey Bertra Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:48
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/06; F01D5/066; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1551402A
Cited
DE492252C
Cited
GB543985A
Cited
CH217031A
Cited
CH225640A
Cited
US2401826A
Cited
US2458149A
Cited
US2440933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-05 | 1957-04-06 | 1957-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-05 | 1961-04-06 | 1961-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-05 | 1965-04-06 | 1965-10-06 | $7700.00 | Window Closed / Lapsed |