Patent US2725211A successfully refreshed from Google Patents.
US2725211A
Expired / Lapsed
US
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Diaphragm valve
Assignee: Grinnell Corp
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Filing: 1951-01-16
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Granted: 1955-11-29
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Expires: 1971-01-16
Abstract
No abstract record available.
Inventors
- 👤 Henry W Boteler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:21
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K7/126
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1470352A
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US1858470A
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US1783281A
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GB434665A
Cited
US2186833A
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US2394243A
Cited
GB578168A
Cited
US2416061A
Cited
US2654559A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-11-28 | 1959-05-30 | 1959-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-11-28 | 1963-05-30 | 1963-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-11-28 | 1967-05-30 | 1967-11-29 | $7700.00 | Window Closed / Lapsed |