Patent US2877791A successfully refreshed from Google Patents.
US2877791A
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Flexible diaphragm flow control valve
Assignee: Fisher Governor Co
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Filing: 1955-08-15
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Granted: 1959-03-17
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Expires: 1975-08-15
Abstract
No abstract record available.
Inventors
- 👤 Herbert G Rich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:36
CPC Classifications
F; F16; F16K; F16K7/00; F16K7/12; F16K7/14; F16K7/17; F16K31/00; F16K31/12; F16K31/36; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3021; Y10T137/304; Y10T137/3052; Y10T137/3056; Y10T137/7722; Y10T137/7758; Y10T137/7759; Y10T137/776; Y10T137/7762; Y10T137/7764; Y10T137/7768; Y10T137/7769; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86759
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE19951C
Cited
US848739A
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US1269721A
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US1496935A
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US1793396A
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US2353143A
Cited
FR965947A
Cited
US2677390A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |