US3578440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nickel-copper alloy
Assignee: Huntington Alloys Corp
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Filing: 1968-03-25
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Granted: 1971-05-11
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Expires: 1988-03-25
Abstract
Abstract AN AGE HARDENABLE NICKEL-COPPER ALLOY HAVING MARKEDLY IMPROVED WELDABILITY AND MACHINABILITY WHICH ALLOY CONTAINS NOT MORE THAN ABOUT 0.1% CARBON, NOT MORE THAN ABOUT 0.5% TITANIUM, ABOUT 2.5% TO ABOUT 3.5% ALUMINUM, ABOUT 63% TO ABOUT 70% NICKEL AND THE BALANCE, EXCEPT FOR INCIDENTAL ELEMENTS AND IMPURITIES, ESSENTIALLY COPPER.
Inventors
- 👤 Herbert L Eiselstein
- 👤 Carl B Haeberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:19
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/002
Claims Analysis
Total Claims: 0
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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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |