US2855175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate valve
Assignee: Individual
•
Filing: 1953-06-19
•
Granted: 1958-10-07
•
Expires: 1973-06-19
Abstract
No abstract record available.
Inventors
- 👤 Calvin D Dunbar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:32
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/02; F16K3/16; F16K3/18; F16K3/184; F16K3/186
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2482409A
Cited
US2583512A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-10-06 | 1962-04-07 | 1962-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-10-06 | 1966-04-07 | 1966-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-10-06 | 1970-04-07 | 1970-10-07 | $7700.00 | Window Closed / Lapsed |