Patent US2993667A successfully refreshed from Google Patents.
US2983280A
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US
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Fluid pressure regulating valve
Assignee: Individual
•
Filing: 1957-12-10
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Granted: 1961-05-09
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Expires: 1977-12-10
Abstract
No abstract record available.
Inventors
- 👤 Richard L Maison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:18
CPC Classifications
G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7822; Y10T137/783; Y10T137/7831; Y10T137/8593; Y10T137/86493; Y10T137/86718; Y10T137/86743; Y10T137/86863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE62860C
Cited
US530765A
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US862867A
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US1213463A
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US1452252A
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US1885000A
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US1948840A
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US2241537A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-08 | 1964-11-07 | 1965-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-08 | 1968-11-07 | 1969-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-08 | 1972-11-07 | 1973-05-09 | $7700.00 | Window Closed / Lapsed |