US3775180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for descaling steel
Assignee: JFE Engineering Corp
•
Filing: 1972-08-22
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Granted: 1973-11-27
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Expires: 1992-08-22
Abstract
Abstract Steel is descaled by spraying a mixture of a solid such as aluminum oxide and silicon carbide, water and a gas such as air under specified conditions onto the steel.
Inventors
- 👤 M Hirata
- 👤 K Kunioka
- 👤 T Shimotsuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:36
CPC Classifications
B; B24; B24C; B24C1/00; B24C1/08; B24C1/086; B24C11/00; B24C7/00; B24C7/0084
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
The method of claim 1, wherein the powder is aluminum oxide.
Claim 2
Dependent Claim
11 words
The method of claim 1, wherein the powder is silicon carbide.
References Cited (Backward Citations)
US2380738A
Cited
US2605596A
Cited
US2817195A
Cited
US2858653A
Cited
US3149445A
Cited
US3447272A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |