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US3653884A
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Process for the continuous production of a strip from powdered metal
Assignee: British Steel Corp
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Filing: 1969-03-13
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Granted: 1972-04-04
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Expires: 1989-03-13
Abstract
Abstract A process is provided for rolling metal strip, particularly iron or iron alloy strip, directly from powdered metal using a technique in which a self-supporting metal powder/binder strip is formed from a slurry containing the metal and binder composition, together with a hygroscopic substance on a support surface and the resultant strip is compacted by rolling and then sintered. Typical hygroscopic substances are polyhydroxy compounds such as glycerol and polyalkylene glycols and their use is found to improve the mechanical properties of the final strip.
Inventors
- 👤 Idwal Davies
- 👤 Alan G Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:46
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/18; B22F1/00; B22F1/10; B22F5/00; B22F5/006; B22F7/00; B22F7/02; B22F7/04; B22F2998/00; B22F2998/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
17 words
The process of claim 1 in which the cellulose derivative is a cellulose ether containing methyl groups.
Claim 2
Dependent Claim
12 words
The process of claim 1 in which the polyhydric alcohol is glycerol.
Claim 3
Dependent Claim
29 words
The process of claim 1 in which the hygroscopic substance is present in the binder composition in an amount of up to 1 percent by weight of the slurry.
Claim 4
Dependent Claim
14 words
The process of claim 1 in which the slurry includes a non-ionic surface-active agent.
Claim 5
Dependent Claim
16 words
A process according to claim 5 in which the non-ionic surface-active agent is a polyoxyalkylene glycol.
Claim 6
Dependent Claim
24 words
The process of claim 1, wherein the slurry further contains a salt of an aliphatic dicarboxylic acid, said salt serving as a corrosion inhibitor.
References Cited (Backward Citations)
US3115698A
Cited
US3335000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |