US2976848A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linearized parallel control valve for control systems
Assignee: Westinghouse Electric Corp
•
Filing: 1957-03-28
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Granted: 1961-03-28
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Expires: 1977-03-28
Abstract
No abstract record available.
Inventors
- 👤 Mark I Place
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:04
CPC Classifications
F; F15; F15B; F15B9/00; F15B9/16; F15B9/17; F16; F16K; F16K31/00; F16K31/12; F16K31/42; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86598; Y10T137/87169; Y10T137/87193; Y10T137/87209
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1231628A
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GB256652A
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US2533042A
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US2644124A
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US2781743A
Cited
US2635584A
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US2649841A
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US2777285A
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US2738772A
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DE1003595B
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |