US3552953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cobalt-chromium base alloy and articles produced therefrom
Assignee: RTX Corp
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Filing: 1969-01-10
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Granted: 1971-01-05
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Expires: 1989-01-10
Abstract
Abstract ALLOYS CONTAINING COBALT, CHROMIUM AND CARBON, PARTICULARLY IN A RELATIONSHIP WHEREIN TWO PRIMARY PHASES FREEZE SIMULTANEOUSLY FROM A MELT, ARE CAST INTO ARTICLES HAVING SUPERIOR HIGH TEMPERATURE STRENGTH AND OXIDATION/SULFIDATION RESISTANCE, THE CAST ARTICLES COMPRISING A MATRIX CONTAINING ABOUT 30 WEIGHT PERCENT CHROMIUM AND A DISPERSED PHASE COMPRISING ABOUT 35-40 PERCENT OF A MIXED CARBIDE OF THE COMPOSITION (CR, CO)23C6.
Inventors
- 👤 Franklin D Lemkey
- 👤 Earl R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:08
CPC Classifications
C; C30; C30B; C30B21/00; C30B21/02; C22; C22C; C22C19/00; C22C19/07; C22C27/00; C22C27/06
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) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |