US3756809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromium cobalt alloy
Assignee: University of Michigan (System)
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Filing: 1972-05-01
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Granted: 1973-09-04
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Expires: 1992-05-01
Abstract
Abstract AN ALLOY CONTAINING AS ESSENTIAL INGREDIENTS 18% TO 28% CHROMIUM, 25% TO 50% COBALT, 18% TO 40% NICKEL AND 12.3 TO 13.5% TANTALUM HAS HIGH STRENGTH AND AN IMPROVED BALANCE OF ELONGATION AND TOUGHNESS, MAKING THE ALLOY PARTICULARLY USEFUL FOR PARTIAL DENTURE PROSTHETICS.
Inventors
- 👤 K Asgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:27
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07; A; A61; A61K; A61K6/00; A61K6/80; A61K6/84
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |