Patent US2854990A successfully refreshed from Google Patents.
US2854990A
Expired / Lapsed
US
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Flow control valve assembly responsive to downstream pressure
Assignee: Individual
•
Filing: 1955-10-06
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Granted: 1958-10-07
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Expires: 1975-10-06
Abstract
No abstract record available.
Inventors
- 👤 Albert J Granberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:38
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/01; G05D7/0106; Y; Y10; Y10T; Y10T137/00; Y10T137/3367; Y10T137/3421; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7805; Y10T137/7831
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US150541A
Cited
US370715A
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US371505A
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US465956A
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US993921A
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US1550717A
Cited
US1958262A
Cited
US2316052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |