US3342628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alloy diffusion process
Assignee: EIDP Inc
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Filing: 1964-05-14
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Granted: 1967-09-19
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Expires: 1984-05-14
Abstract
No abstract record available.
Inventors
- 👤 John R Sinclair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:31
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
A PROCESS FOR FORMING A PT-FE ALLOY DIFFUSION COATING ON A FERROUS METAL ARTICLE COMPRISING CONTACTING SAID ARTICLE IN A MOLTEN BATH CONTAINING AN ADMIXTURE OF CALCIUM AND CALCIUM CHLORIDE AND A SOURCE OF PLATINUM; WHEREIN THE AMOUNT OF CALCIUM IS IN THE RANGE OF FROM 0.5-50% BY WEIGHT OF SAID ADMIXTURE; AND WHREIN SAID CONTACTING IS CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE.
Claim 2
Dependent Claim
72 words
A PROCESS FOR FORMING A PT-FE ALLOY DIFFUSION COATING ON A FERROUS METAL ARTICLE COMPRISING CONTACTING SAID ARTICLE IN A MOLTEN BATH CONTAINING AN ADMIXTURE OF CALCIUM AND CALCIUM CHLORIDE AND A SOURCE OF PLATINUM; WHEREIN THE AMOUNT OF CALCIUM IS IN THE RANGE OF FROM 0.5-50% BY WEIGHT OF SAID ADMIXTURE; AND WHREIN SAID CONTACTING IS CARRIED OUT AT A TEMPERATURE BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE.
References Cited (Backward Citations)
FR1312819A
Cited
US3184331A
Cited
US3236684A
Cited
US3184292A
Cited
US3261712A
Cited
US3287159A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-18 | 1971-03-20 | 1971-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-18 | 1975-03-20 | 1975-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-18 | 1979-03-20 | 1979-09-19 | $7700.00 | Window Closed / Lapsed |