Patent US2803424A successfully refreshed from Google Patents.
US2803424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional check valve housing with clamping means
Assignee: Individual
•
Filing: 1953-08-14
•
Granted: 1957-08-20
•
Expires: 1973-08-14
Abstract
No abstract record available.
Inventors
- 👤 Daniel U Mccabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:19
CPC Classifications
F; F16; F16K; F16K27/00; F16K27/02; F16K27/0209; F16K15/00; F16K15/02; F16K15/06; F16K15/063; F16K15/065; Y; Y10; Y10T; Y10T137/00; Y10T137/7504; Y10T137/7668
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US829316A
Cited
FR358381A
Cited
US1041237A
Cited
US1187553A
Cited
US1277463A
Cited
US1653613A
Cited
US1675082A
Cited
DE705230C
Cited
US2297942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |