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Patent US2835470A successfully refreshed from Google Patents.
US2835470A
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US
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Fluid turbines
Assignee: PIESSEY Co Ltd
•
Filing: 1956-02-17
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Granted: 1958-05-20
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Expires: 1976-02-17
Abstract
No abstract record available.
Inventors
- 👤 Trowbridge David Roy
- 👤 Ross Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:04
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/141; B; B64; B64D; B64D41/00; B64D41/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US329567A
Cited
US2140148A
Cited
GB479889A
Cited
FR1010604A
Cited
US2752858A
Cited
US2737897A
Cited
US2651493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-19 | 1961-11-18 | 1962-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-19 | 1965-11-18 | 1966-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-19 | 1969-11-18 | 1970-05-20 | $7700.00 | Window Closed / Lapsed |