US3236684A
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: 1966-02-22
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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
2026-10-28 05:39
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR FORMING A SILICON-IRON ALLOY DIFFUSION COATING ON A FERROUS METAL ARTICLE COMPRISING CONTACTING SAID ARTICLE WITH A MOLTEN BATH CONTAINING AN ADMIXTURE OF A GROUP IIA METAL SELECTED FROM THE CLASS CONSISTING OF CALCIUM, BARIUM, AND STRONTIUM AND A SOURCE OF SILICON, SAID BATH CONTAINING AT LEAST ABOUT 5% BY WEIGHT OF SAID GROUP IIA METAL AND LESS THAN ABOUT 60% SILICON BY WEIGHT, THE TEMPERATURE OF SAID BATH BEING MAINTAINED BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE, SAID ARTICLE BEING MAINTAINED IN CONTACT WITH SAID BATH FOR A TIME SUFFICIENT TO PROVIDE A SILICON/IRON ALLOY DIFFUSION COATING THEREON.
Claim 2
Dependent Claim
105 words
A PROCESS FOR FORMING A SILICON-IRON ALLOY DIFFUSION COATING ON A FERROUS METAL ARTICLE COMPRISING CONTACTING SAID ARTICLE WITH A MOLTEN BATH CONTAINING AN ADMIXTURE OF A GROUP IIA METAL SELECTED FROM THE CLASS CONSISTING OF CALCIUM, BARIUM, AND STRONTIUM AND A SOURCE OF SILICON, SAID BATH CONTAINING AT LEAST ABOUT 5% BY WEIGHT OF SAID GROUP IIA METAL AND LESS THAN ABOUT 60% SILICON BY WEIGHT, THE TEMPERATURE OF SAID BATH BEING MAINTAINED BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE, SAID ARTICLE BEING MAINTAINED IN CONTACT WITH SAID BATH FOR A TIME SUFFICIENT TO PROVIDE A SILICON/IRON ALLOY DIFFUSION COATING THEREON.
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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |