US3236498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic reaction turbines and pump turbines
Assignee: English Electric Co Ltd
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Filing: 1963-07-22
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Granted: 1966-02-22
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Expires: 1983-07-22
Abstract
No abstract record available.
Inventors
- 👤 Kerensky Gleb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:36
CPC Classifications
F; F03; F03B; F03B15/00; F03B15/005; F03B15/02; F03B15/04; F03B15/06; F03B3/00; F03B3/16; F03B3/18; F03B3/183; Y; Y02; Y02E; Y02E10/00; Y02E10/20; Y10; Y10S; Y10S415/00; Y10S415/91
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
IN A HYDRAULIC REACTION TURBINE HAVING A MAIN VALVE IN A PENSTOCK AND ADJUSTABLE GUIDE VANES IN A CASING MEANS TO OPEN SAID MAIN VALVE, MEANS TO OPEN SAID ADJUSTABLE GUIDE VANES, AND MEANS INTERLOCKING EACH OF SAID MEANS TO PREVENT THE EQUIVALENT AREA OF THE ADJUSTABLE GUIDE VANES EXCEEDING THAT OF THE MAIN VALVE.
References Cited (Backward Citations)
US1706812A
Cited
US2713643A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |