US2825528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve with hydraulic expanding gate
Assignee: Individual
•
Filing: 1953-05-01
•
Granted: 1958-03-04
•
Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
- 👤 Arthur R Truitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:06
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/12; F16K3/14
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE593945C
Cited
US686703A
Cited
US978927A
Cited
US1476862A
Cited
US1538108A
Cited
US1541465A
Cited
US1712882A
Cited
US1667999A
Cited
DE528548C
Cited
DE711187C
Cited
US2298632A
Cited
US2390201A
Cited
US2705610A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-03-03 | 1961-09-02 | 1962-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-03-03 | 1965-09-02 | 1966-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-03-03 | 1969-09-02 | 1970-03-04 | $7700.00 | Window Closed / Lapsed |