Patent US2431769A successfully refreshed from Google Patents.
US2431769A
Expired / Lapsed
US
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Quick opening check valve assembly
Assignee: Parker Appliance Co
•
Filing: 1943-04-30
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Granted: 1947-12-02
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Expires: 1963-04-30
Abstract
No abstract record available.
Inventors
- 👤 Arthur L Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:33
CPC Classifications
F; F16; F16K; F16K15/00; F16K15/02; F16K15/025; F16K15/026; Y; Y10; Y10S; Y10S137/00; Y10S137/904; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7738; Y10T137/7837; Y10T137/785; Y10T137/7866; Y10T137/7867
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US152179A
Cited
US1036387A
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US1128092A
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US1539617A
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US1694427A
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US1777680A
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US2185173A
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US2223944A
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US2165611A
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US2223509A
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US2318963A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-01 | 1951-06-02 | 1951-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-01 | 1955-06-02 | 1955-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-01 | 1959-06-02 | 1959-12-02 | $7700.00 | Window Closed / Lapsed |