US2773761A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrous chrome alloy
Assignee: Calumet Steel Castings Corp
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Filing: 1954-01-08
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Granted: 1956-12-11
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Expires: 1974-01-08
Abstract
No abstract record available.
Inventors
- 👤 John H Fuqua
- 👤 Walter F Jicha
- 👤 Veselik Emil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:28
CPC Classifications
C; C22; C22C; C22C37/00; C22C37/06; C22C37/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
49 words
A FERROUS CHROME ALLOY FOR CASTING PURPOSES CHARACTERIZED, AS CAST, BY A MATRIX OF UNRESOLVED PEARLITE HAVING A ROCKWELL C HARDNESS OF SUBSTANTIALLY 45 AND CONTAINING COMPLEX CARBIDES OF IRON, CHROMIUM AND MOLYBEDNUM, THE ALLOY BEING AUSTENIZED BY AIR QUENCHING FROM SUBSTANTIALLY 2020* F. AFTER WHICH THE SAME DEMON-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-11 | 1960-06-11 | 1960-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-11 | 1964-06-11 | 1964-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-11 | 1968-06-11 | 1968-12-11 | $7700.00 | Window Closed / Lapsed |