Patent US2693337A successfully refreshed from Google Patents.
US2693337A
Expired / Lapsed
US
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Valve for corrosive fluids
Assignee: Flowserve Corp
•
Filing: 1949-04-11
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Granted: 1954-11-02
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Expires: 1969-04-11
Abstract
No abstract record available.
Inventors
- 👤 James M Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:10
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/48; F16K27/00; F16K27/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US941934A
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US1019278A
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US1150779A
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US1850953A
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US1763486A
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US1664270A
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US1951037A
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US1915064A
Cited
GB414415A
Cited
US2470700A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-11-01 | 1958-05-03 | 1958-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-11-01 | 1962-05-03 | 1962-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-11-01 | 1966-05-03 | 1966-11-02 | $7700.00 | Window Closed / Lapsed |