US3481769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy diffusion coating process
Assignee: EIDP Inc
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Filing: 1964-03-02
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Granted: 1969-12-02
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Expires: 1984-03-02
Abstract
No abstract record available.
Inventors
- 👤 Giles F Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:46
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/941
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR FORMING AN ALUMINUM-IRON ALLOY DIFFUSION COATING ON A FERROUS METAL ARTICLE, SAID ARTICLE BEING SELECTED FROM THE GROUP CONSISTING OF MILD STEEL AND STAINLESS STEEL ARTICLES, COMPRISING CONTACTING SAID ARTICLE IN A MOLTEN BATH FOR A PERIOD OF TIME SUFFICIENT TO OBTAIN AN ALUMIUM-IRON DIFFUSION COATING THEREON, SAID BATH CONSISTING ESSENTIALLY OF AN ADMIXTURE OF A GROUP II-A METAL SELECTED FROM THE CLASS CONSISTING OF CALCIUM, BARIUM, MAGNESIUM, AND STRONTIUM AND A SOURCE OF ALUMINUM WHEREIN SAID METAL IS PRESENT IN AN AMOUNT FROM ABOUT 5% TO ABOUT 99% BY WEIGHT AND SAID ALUMINUM IS PRESENT DURING SAID PERIOD OF CONTACTING IN AN AMOUNT LESS THAN 70% BY WEIGHT OF SAID BATH, THE TEMPERATURE OF SAID BATH BEING MAINTAINED BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE.
Claim 2
Dependent Claim
132 words
A PROCESS FOR FORMING AN ALUMINUM-IRON ALLOY DIFFUSION COATING ON A FERROUS METAL ARTICLE, SAID ARTICLE BEING SELECTED FROM THE GROUP CONSISTING OF MILD STEEL AND STAINLESS STEEL ARTICLES, COMPRISING CONTACTING SAID ARTICLE IN A MOLTEN BATH FOR A PERIOD OF TIME SUFFICIENT TO OBTAIN AN ALUMIUM-IRON DIFFUSION COATING THEREON, SAID BATH CONSISTING ESSENTIALLY OF AN ADMIXTURE OF A GROUP II-A METAL SELECTED FROM THE CLASS CONSISTING OF CALCIUM, BARIUM, MAGNESIUM, AND STRONTIUM AND A SOURCE OF ALUMINUM WHEREIN SAID METAL IS PRESENT IN AN AMOUNT FROM ABOUT 5% TO ABOUT 99% BY WEIGHT AND SAID ALUMINUM IS PRESENT DURING SAID PERIOD OF CONTACTING IN AN AMOUNT LESS THAN 70% BY WEIGHT OF SAID BATH, THE TEMPERATURE OF SAID BATH BEING MAINTAINED BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-01 | 1973-06-02 | 1973-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-01 | 1977-06-02 | 1977-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-01 | 1981-06-02 | 1981-12-02 | $7700.00 | Window Closed / Lapsed |