Patent US2426040A successfully refreshed from Google Patents.
US2426040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: Individual
•
Filing: 1944-03-10
•
Granted: 1947-08-19
•
Expires: 1964-03-10
Abstract
No abstract record available.
Inventors
- 👤 George L Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:33
CPC Classifications
F; F24; F24D; F24D19/00; F24D19/08; F24D19/081; F16; F16K; F16K15/00; F16K15/14; F16K15/144; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7783
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US213118A
Cited
US445257A
Cited
GB190117325A
Cited
US1133738A
Cited
US1497726A
Cited
US1654474A
Cited
US1762148A
Cited
US1701277A
Cited
US2332695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-08-18 | 1951-02-17 | 1951-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-08-18 | 1955-02-17 | 1955-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-08-18 | 1959-02-17 | 1959-08-19 | $7700.00 | Window Closed / Lapsed |