US2709455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Line blind valve
Assignee: Individual
•
Filing: 1952-02-21
•
Granted: 1955-05-31
•
Expires: 1972-02-21
Abstract
No abstract record available.
Inventors
- 👤 Dolphice H Greenwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:49
CPC Classifications
F; F16; F16K; F16K3/00; F16K3/30; F16K3/312
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US467955A
Cited
US1938460A
Cited
US2433973A
Cited
DE324654C
Cited
US1599168A
Cited
US2214959A
Cited
US2340499A
Cited
US2360734A
Cited
US2566343A
Cited
US2558247A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-05-30 | 1958-11-29 | 1959-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-30 | 1962-11-29 | 1963-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-30 | 1966-11-29 | 1967-05-31 | $7700.00 | Window Closed / Lapsed |