Patent US3633565A successfully refreshed from Google Patents.
Patent BE679726A successfully refreshed from Google Patents.
US2552376A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plug valve
Assignee: Electric Steel Foundry Co
•
Filing: 1947-03-05
•
Granted: 1951-05-08
•
Expires: 1967-03-05
Abstract
No abstract record available.
Inventors
- 👤 Mills Florence Fatricia
- 👤 John H Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:52
CPC Classifications
F; F16; F16K; F16K5/00; F16K5/08; F16K5/14; F16K5/18; F16K5/188; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4358; Y10T137/4393; Y10T137/44
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB159666A
Cited
US2030408A
Cited
US2250124A
Cited
US2319943A
Cited
US2308399A
Cited
US2388827A
Cited
US2389670A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |