Patent US3809534A successfully refreshed from Google Patents.
US2874894A
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Gas reaction rotors
Assignee: Westinghouse Electric Corp
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Filing: 1957-03-01
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Granted: 1959-02-24
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Expires: 1977-03-01
Abstract
No abstract record available.
Inventors
- 👤 Fabio R Goldschmied
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:48
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/66; F04D29/68; F04D29/681; F04D25/00; F04D25/02; F04D25/04; F04D25/045; Y; Y10; Y10S; Y10S415/00; Y10S415/914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2305226A
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US2476001A
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US2489683A
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US2476002A
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US2649243A
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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) | 1962-02-23 | 1962-08-25 | 1963-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-23 | 1966-08-25 | 1967-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-23 | 1970-08-25 | 1971-02-24 | $7700.00 | Window Closed / Lapsed |