US2874070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the formation of diffusion superficial alloys, in particular chromium alloys
Assignee: Office National d'Études et de Recherches Aérospatiales
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Filing: 1954-10-29
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Granted: 1959-02-17
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Expires: 1974-10-29
Abstract
No abstract record available.
Inventors
- 👤 Galmiche Philippe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:09
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/06; C23C10/08; C23C10/10; C23C10/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A METHOD OF FORMING A SUPERFICIAL ALLOY OF CHROMIUM ON A METAL BODY HAVING AS A PRINCIPAL COMPONENT A METAL SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL AND COBALT COMPRISING HEATING A CEMENTATION MIXTURE CAPABLE OF FORMING CHROMIUM FLUORIDE VAPORS ON HEATING, HEATING SAID METAL BODY TO REACH AND MAINTAIN A TEMPERATURE AT WHICH CHROMIUM FROM SAID VAPORS WILL DIFFUSE INTO THE SURFACE OF SAID METAL BODY, BRINGING SAID VAPORS IN CONTACT WITH, WHILE MAINTAINING SAID CEMENTATION MIXTURE OUT OF CONTACT WITH, SAID METAL BODY SURFACE, AND MAINTAINING THE RELATIVE TEMPERATURES OF SAID VAPORS AND SAID METAL BODY SURFACE DURING THE HEATING SAID METAL BODY TO REACH SAID DIFFUSION TEMPERATURE SO AS TO PREVENT CONDENSATION OF CHROMIUM FLUORIDE ON SAID METAL BODY.
Claim 2
Independent Claim
123 words
A METHOD OF FORMING A SUPERFICIAL ALLOY OF CHROMIUM ON A METAL BODY HAVING AS A PRINCIPAL COMPONENT A METAL SELECTED FROM THE GROUP CONSISTING OF IRON, NICKEL AND COBALT COMPRISING HEATING A CEMENTATION MIXTURE CAPABLE OF FORMING CHROMIUM FLUORIDE VAPORS ON HEATING, HEATING SAID METAL BODY TO REACH AND MAINTAIN A TEMPERATURE AT WHICH CHROMIUM FROM SAID VAPORS WILL DIFFUSE INTO THE SURFACE OF SAID METAL BODY, BRINGING SAID VAPORS IN CONTACT WITH, WHILE MAINTAINING SAID CEMENTATION MIXTURE OUT OF CONTACT WITH, SAID METAL BODY SURFACE, AND MAINTAINING THE RELATIVE TEMPERATURES OF SAID VAPORS AND SAID METAL BODY SURFACE DURING THE HEATING SAID METAL BODY TO REACH SAID DIFFUSION TEMPERATURE SO AS TO PREVENT CONDENSATION OF CHROMIUM FLUORIDE ON SAID METAL BODY.
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) | 1962-02-16 | 1962-08-18 | 1963-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-02-16 | 1966-08-18 | 1967-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-02-16 | 1970-08-18 | 1971-02-17 | $7700.00 | Window Closed / Lapsed |