Patent DE435782C successfully refreshed from Google Patents.
Patent US2925244A successfully refreshed from Google Patents.
US2925244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: W R AMES CO
•
Filing: 1957-05-21
•
Granted: 1960-02-16
•
Expires: 1977-05-21
Abstract
No abstract record available.
Inventors
- 👤 Robert E Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:26
CPC Classifications
F; F16; F16K; F16K3/00; B; B05; B05B; B05B15/00; B05B15/60; B05B15/65; B05B15/658
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2499738A
Cited
US2771904A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-15 | 1963-08-17 | 1964-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-15 | 1967-08-17 | 1968-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-15 | 1971-08-17 | 1972-02-16 | $7700.00 | Window Closed / Lapsed |