US2449023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Austentic alloy steels
Assignee: Thos Firth & John Brown Ltd
•
Filing: 1946-07-02
•
Granted: 1948-09-07
•
Expires: 1966-07-02
Abstract
No abstract record available.
Inventors
- 👤 Thornton Alfred Everett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:53
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/18; C22C38/40; C22C38/58
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE695049C
Cited
US2319538A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-07 | 1952-03-08 | 1952-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-07 | 1956-03-08 | 1956-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-07 | 1960-03-08 | 1960-09-07 | $7700.00 | Window Closed / Lapsed |