Patent US3287159A successfully refreshed from Google Patents.
US3287159A
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Process for forming an iron-chromiumaluminum coating on a ferrous article
Assignee: EIDP Inc
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Filing: 1965-10-15
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Granted: 1966-11-22
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Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Harold E Bellis
- 👤 Giles F Casrter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:22
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/18; C23C10/20; C23C10/22; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/936; Y10S428/938; Y10S428/939; Y10S428/94; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12861; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
113 words
A PROCESS FOR FORMING A FERRITIC ALLOY COATING ON A FERROUS METAL ARTICLES, THE TOP 0.3 MIL OF SAID COATING HAVING A COMPOSITION CONSISTING ESSENTIALLY OF IRON, AT LEAST 12% BY WEIGHT CHROMIUM, AND FROM ABOUT 0.08% TO 4% BY WEIGHT OF ALUMINUM, COMPRISING IMMERSING SAID ARTICLE IN A MOLTEN BATH MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE CONTAINING CALCIUM AS A METAL TRANSFER AGENT AND HAVING INCORPORATED THEREIN AT LEAST 0.25% BY WEIGHT CHROMIUM BASED ON THE AMOUNT OF CALCIUM IN SAID BATH AND A CONCENTRATION OF DISSOLVED ALUMINUM FROM ABOUT 0.04% TO 3% BY WEIGHT BASED ON THE AMOUNT OF CALCIUM IN SAID BATH.
Claim 2
Dependent Claim
113 words
A PROCESS FOR FORMING A FERRITIC ALLOY COATING ON A FERROUS METAL ARTICLES, THE TOP 0.3 MIL OF SAID COATING HAVING A COMPOSITION CONSISTING ESSENTIALLY OF IRON, AT LEAST 12% BY WEIGHT CHROMIUM, AND FROM ABOUT 0.08% TO 4% BY WEIGHT OF ALUMINUM, COMPRISING IMMERSING SAID ARTICLE IN A MOLTEN BATH MAINTAINED AT A TEMPERATURE BETWEEN ABOUT 800*C. AND THE MELTING POINT OF SAID ARTICLE CONTAINING CALCIUM AS A METAL TRANSFER AGENT AND HAVING INCORPORATED THEREIN AT LEAST 0.25% BY WEIGHT CHROMIUM BASED ON THE AMOUNT OF CALCIUM IN SAID BATH AND A CONCENTRATION OF DISSOLVED ALUMINUM FROM ABOUT 0.04% TO 3% BY WEIGHT BASED ON THE AMOUNT OF CALCIUM IN SAID BATH.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-21 | 1970-05-23 | 1970-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-21 | 1974-05-23 | 1974-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-21 | 1978-05-23 | 1978-11-22 | $7700.00 | Window Closed / Lapsed |