US2801068A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control of feathering runner vanes of hydraulic turbines and pumps
Assignee: English Electric Co Ltd
•
Filing: 1954-11-05
•
Granted: 1957-07-30
•
Expires: 1974-11-05
Abstract
No abstract record available.
Inventors
- 👤 Deriaz Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:47
CPC Classifications
F; F03; F03B; F03B3/00; F03B3/12; F03B3/14; F03B3/145; F04; F04D; F04D15/00; F04D15/0055; F15; F15B; F15B15/00; F15B15/08; F15B15/12; F05; F05B; F05B2260/00; F05B2260/40; F05B2260/406; F05B2260/70; F05B2260/76; Y; Y02; Y02E; Y02E10/00; Y02E10/20
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) | 1960-07-29 | 1961-01-28 | 1961-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-29 | 1965-01-28 | 1965-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-29 | 1969-01-28 | 1969-07-30 | $7700.00 | Window Closed / Lapsed |