US3861966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Densification of alloys
Assignee: GTE Sylvania Inc
•
Filing: 1973-08-15
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Granted: 1975-01-21
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Expires: 1993-08-15
Abstract
Abstract A process suitable for densifying metal-alloy powders such as oxide-strengthened metal alloy powder is disclosed which involves heat treating a shaped article from alloy powders in a reducing atmosphere to remove volatiles and oxygen from the matrix metal, providing a non-oxidizing atmosphere for the shaped article and working the alloy under heated conditions to reduce the thickness of the alloy to thereby affect a density increase. The process prevents undesired dispersed-metal oxide particle growth and clustering of the particles.
Inventors
- 👤 Jr William Scheithauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:59
CPC Classifications
C; C22; C22C; C22C1/00; C22C1/04; C22C1/05; C22C1/051; C22C1/053; B; B22; B22F; B22F3/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
14 words
A process according to claim 1 wherein said refractory metal oxide is thorium oxide.
Claim 2
Dependent Claim
12 words
A process according to claim 2 wherein said matrix metal is nickel.
Claim 3
Dependent Claim
12 words
A process according to claim 2 wherein said matrix metal is copper.
Claim 4
Dependent Claim
16 words
A process according to claim 1 wherein the theoretical density after working is abOut 98 percent.
References Cited (Backward Citations)
US3087234A
Cited
US3346427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-20 | 1978-07-22 | 1979-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-20 | 1982-07-22 | 1983-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-20 | 1986-07-22 | 1987-01-21 | $7700.00 | Window Closed / Lapsed |