Patent US2575875A successfully refreshed from Google Patents.
US2575875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-temperature gas valve
Assignee: United States Steel Corp
•
Filing: 1948-01-20
•
Granted: 1951-11-20
•
Expires: 1968-01-20
Abstract
No abstract record available.
Inventors
- 👤 Fred H Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:11
CPC Classifications
F; F16; F16K; F16K49/00; F16K49/005; F16K49/007; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6579
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US267234A
Cited
US548636A
Cited
US659805A
Cited
US723582A
Cited
US997461A
Cited
US1323328A
Cited
US1873119A
Cited
US1953611A
Cited
US2204724A
Cited
US2446196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-19 | 1955-05-21 | 1955-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-19 | 1959-05-21 | 1959-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-19 | 1963-05-21 | 1963-11-20 | $7700.00 | Window Closed / Lapsed |