US2540668A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug valve
Assignee: Electric Steel Foundry Co
•
Filing: 1945-01-20
•
Granted: 1951-02-06
•
Expires: 1965-01-20
Abstract
No abstract record available.
Inventors
- 👤 Joye C Haun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:14
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/22; F16K5/222; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4365; Y10T137/4393; Y10T137/4421; Y10T137/4442
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB256098A
Cited
US1944995A
Cited
US1961102A
Cited
US2012427A
Cited
US2229120A
Cited
US2255182A
Cited
US2281697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |