Patent US3522929A successfully refreshed from Google Patents.
US3522929A
Expired / Lapsed
US
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Valve for controlling elastic fluid
Assignee: Westinghouse Electric Corp
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Filing: 1968-01-04
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Granted: 1970-08-04
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Expires: 1988-01-04
Abstract
No abstract record available.
Inventors
- 👤 Joseph De Simone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:49
CPC Classifications
F; F01; F01D; F01D17/00; F01D17/10; F01D17/12; F01D17/14; F01D17/148; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/20; F16K1/2007; F16K1/2028; F16L; F16L55/00; F16L55/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |