US3754895A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for decarburization of steels
Assignee: Allegheny Ludlum Corp
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Filing: 1971-01-27
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Granted: 1973-08-28
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Expires: 1991-01-27
Abstract
Abstract Described herein is an improved process for decarburization of straight carbon as well as alloy-bearing steels without the loss through oxidation of valuable metallic alloying elements such as chromium, manganese, and iron, by careful control of the input of oxidizing material.
Inventors
- 👤 S Ramachandran
- 👤 B Igwe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 00:26
CPC Classifications
C; C21; C21C; C21C7/00; C21C7/04; C21C7/068
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
12 words
A method according to claim 1 wherein said oxidizing gas contains steam.
Claim 2
Dependent Claim
13 words
A method according to claim 1 wherein said oxidizing gas contains carbon dioxide.
Claim 3
Dependent Claim
25 words
A method according to claim 1 wherein said oxidizing gas includes a diluent gas from the group consisting of argon, helium, nitrogen, and carbon monoxide.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |