US3676085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cobalt base coating for the superalloys
Assignee: RTX Corp
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Filing: 1971-02-18
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Granted: 1972-07-11
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Expires: 1991-02-18
Abstract
Abstract THE OXIDATION-EROSION AND SULFIDATION RESISTANCE OF THE NICKEL-AND COBALT-BASE SUPERALLOYS IS MARKEDLY IMPROVED THROUGH THE USE OF A COATING CONSISTING OF COBALT,CHROMIUM, ALUMINUM AND AN ACTIVE METAL SUCH AS YTTRIUM, PARTICULARLY AT THE COMPOSITION, BY WEIGHT, BY OF 15-40 PERCENT CHROMIUM, 10-25 PERCENT ALUMINUM, .01-5 PERCENT YTTRIUM, BALANCE COBALT.
Inventors
- 👤 Dennis J Evans
- 👤 Richard C Elam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:15
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/06; C23C14/14; C23C14/16; C22; C22C; C22C19/00; C22C19/07; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12931
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |