US2822819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cuspate check valve
Assignee: GEERAERT Corp
•
Filing: 1953-08-07
•
Granted: 1958-02-11
•
Expires: 1973-08-07
Abstract
No abstract record available.
Inventors
- 👤 Geeraert Leon Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:02
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; F; F16; F16K; F16K15/00; F16K15/14; F16K15/144; F16K15/147; F16K15/1471; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882; Y10T137/7885
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US168776A
Cited
US270853A
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US584091A
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DE571874C
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US2092757A
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US2201837A
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US2236477A
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US2750959A
Cited
US2687707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |