US3657801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of joining certain metals
Assignee: United States Atomic Energy Commission
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Filing: 1970-04-22
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Granted: 1972-04-25
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Expires: 1990-04-22
Abstract
Abstract Method of forming strong and thermally durable bonds between aluminum and titanium, tungsten or SiGe alloys and between titanium and either tungsten or SiGe alloys for use in thermoelectric generators.
Inventors
- 👤 Lawrence H Hershenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:58
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/81; H10N10/817
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
37 words
The method of claim 1 wherein said heating steps are at 900* C. and 635* C. respectively for one hour each and wherein said first assembly is cooled over a period of 2 hours to 250* C.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |