Patent US3671230A successfully refreshed from Google Patents.
US3671230A
Expired / Lapsed
US
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Method of making superalloys
Assignee: ALLEGHENY INTERNATIONAL ACCEPTANCE Corp
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Filing: 1969-02-19
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Granted: 1972-06-20
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Expires: 1989-02-19
Abstract
Abstract A PROCESS FOR MAKING A SUPERALLOY HAVING IMPROVED PROPERTIES WHEREBY A MOTEN ALLOY IS INITIALLY MICROCAST IN A NONOXIDIZING, SUBSTANTIALLY MOISTURE-FREE ATOMOSPHERE, FORMING A METALLIC POWDER OF A CONTROLLED PARTICLE SIZE AND SHAPE AND HAVING AN OXYGEN CONTENT OF LESS THAN ABOUT 100 P.P.M., AND THEREAFTER CONFINING THE POWDER IN A DEFORMABLE METAL CONTAINER WHILE IN A PROTECTED ATMOSPHERE AND SIMULTANEOUSLY COMPACTING AND FORGING THE POWDER AT AN ELEVATED TEMPERATURE AND AT A CONTROLLED RATE, FORMING A SUBSTANTIALLY DENSE SOLID MASS CHARACTERIZED BY ITS SUBSTANTIALLY UNIFORM FINE-SIZED WROUGHT-TYPE GRAIN STRUCTURE.
Inventors
- 👤 John W Smythe
- 👤 Philip I Karp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:48
CPC Classifications
B; B21; B21J; B21J5/00; B22; B22F; B22F3/00; B22F3/12; B22F3/1208; Y; Y10; Y10S; Y10S75/00; Y10S75/95
Claims Analysis
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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) | 1975-06-20 | 1975-12-20 | 1976-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-20 | 1979-12-20 | 1980-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-20 | 1983-12-20 | 1984-06-20 | $7700.00 | Window Closed / Lapsed |