Patent US2660195A successfully refreshed from Google Patents.
US2660195A
Expired / Lapsed
US
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Multiple valve
Assignee: Dresser Industries Inc
•
Filing: 1949-08-19
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Granted: 1953-11-24
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Expires: 1969-08-19
Abstract
No abstract record available.
Inventors
- 👤 Roger E Risley
- 👤 Howard L Hoke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:04
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/06; F16K27/062; Y; Y10; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0402; Y10T137/8593; Y10T137/86493; Y10T137/86839; Y10T137/87265; Y10T137/87338; Y10T137/87362; Y10T137/8737
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US631868A
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US666316A
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US879492A
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US925692A
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US1169734A
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US1620717A
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US1940720A
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CH162221A
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US2113775A
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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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |