US3343982A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating of cobalt alloys
Assignee: RTX Corp
•
Filing: 1964-10-21
•
Granted: 1967-09-26
•
Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Douglas H Maxwell
- 👤 Suyama Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:53
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/07; C23; C23C; C23C10/00; C23C10/28; C23C10/34; C23C10/52; C23C10/54; C23C10/56; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
THE METHOD OF FORMING A PROTECTIVE COATING ON A COBALT ALLOY CONTAINING AT LEAST ABOUT 36% OF COBALT, WHICH RENDERS THE ALLOY RESISTANT TO OXIDATION AT ELEVATED TEMPERATURES, COMPRISING EMBEDDING THE ALLOY TO BE COATED IN A GRANULAR MIXTURE OF FROM 0.5% TO 2% BY WEIGHT OF CHROMIUM METAL, FROM 1.5% TO 3% BY WEIGHT OF AN ALUMINUM-MAGNESIUM ALLOY CONTAINING FROM 10% TO 20% MAGNESIUM, FROM 0.005% TO 0.008% BY WEIGHT OF CHROMIC CHLORIDE AND FROM 0.001% TO 0.005% BY WEIGHT OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ELEMENTAL IODINE AND AMMONIUM IODIDE, AND FROM 95% TO 98% BY WEIGHT OF AN INERT CARRIER MATERIAL, AND HEATING THE EMBEDDED ALLOY, IN A PROTECTIVE ATMOSPHERE, AT A TEMPERATURE, AT LEAST ABOUT 1800*F., AND A TIME SUFFICIENT TO OBTAIN THE DESIRED COATING THICKNESS.
Claim 2
Independent Claim
133 words
THE METHOD OF FORMING A PROTECTIVE COATING ON A COBALT ALLOY CONTAINING AT LEAST ABOUT 36% OF COBALT, WHICH RENDERS THE ALLOY RESISTANT TO OXIDATION AT ELEVATED TEMPERATURES, COMPRISING EMBEDDING THE ALLOY TO BE COATED IN A GRANULAR MIXTURE OF FROM 0.5% TO 2% BY WEIGHT OF CHROMIUM METAL, FROM 1.5% TO 3% BY WEIGHT OF AN ALUMINUM-MAGNESIUM ALLOY CONTAINING FROM 10% TO 20% MAGNESIUM, FROM 0.005% TO 0.008% BY WEIGHT OF CHROMIC CHLORIDE AND FROM 0.001% TO 0.005% BY WEIGHT OF A SUBSTANCE SELECTED FROM THE GROUP CONSISTING OF ELEMENTAL IODINE AND AMMONIUM IODIDE, AND FROM 95% TO 98% BY WEIGHT OF AN INERT CARRIER MATERIAL, AND HEATING THE EMBEDDED ALLOY, IN A PROTECTIVE ATMOSPHERE, AT A TEMPERATURE, AT LEAST ABOUT 1800*F., AND A TIME SUFFICIENT TO OBTAIN THE DESIRED COATING THICKNESS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |