US3772058A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of refractory coatings on steel without loss of temper of steel
Assignee: Texas Instruments Inc
•
Filing: 1969-10-01
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Granted: 1973-11-13
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Expires: 1989-10-01
Abstract
Abstract Improved refractory coatings are provided in processes involving the chemical vapor phase deposition of a refractory coating upon a substrate by initially coating the substrate with a continuous adherent layer of substantially pure elemental material. For example, in a process for the vapor deposition of titanium carbonitride on a substrate such as stainless steel, by the contact of vaporous reactants containing titanium, carbon, and nitrogen, the substrate is initially plated with a continuous adherent layer of pure nickel, and the titanium carbonitride coating is applied over the nickel.
Inventors
- 👤 J Bloom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:05
CPC Classifications
C; C23; C23C; C23C16/00; C23C16/22; C23C16/30; C23C16/36; C23C16/02; C23C16/0272; C23C16/0281; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/938; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12576; Y10T428/12771; Y10T428/12861; Y10T428/12937
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
73 words
The method of claim 1 wherein said coating is formed by steps of: a. applying a coating of said metal or alloy to said substrate; b. subjecting said metal or alloy and said substrate to an atmosphere of hydrogen nd heating said substrate and metal or alloy to a temperature of less than 800* C. to remove sorbed impurities therefrom; and c. removing impurity deposits from the surface of said metal or alloy.
Claim 2
Dependent Claim
43 words
The method of claim 2 wherein said deposits are removed from the surface of said metal or alloy by initially contacting said metal or alloy with an agitated detergent solution, and thereafter contacting said surface with an aqueous solution of dilute mineral acid.
Claim 3
Dependent Claim
11 words
The method of claim 1 wherein said carbonitride is titanium carbonitride.
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |