Patent US2431769A successfully refreshed from Google Patents.
US2431769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quick opening check valve assembly
Assignee: Parker Appliance Co
•
Filing: 1943-04-30
•
Granted: 1947-12-02
•
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 15:41
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US152179A
Cited
US1036387A
Cited
US1128092A
Cited
US1539617A
Cited
US1694427A
Cited
US1777680A
Cited
US2185173A
Cited
US2223944A
Cited
US2165611A
Cited
US2223509A
Cited
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 |