US2665998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing highly refractory bodies
Assignee: Fansteel Inc
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Filing: 1950-03-18
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Granted: 1954-01-12
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Expires: 1970-03-18
Abstract
No abstract record available.
Inventors
- 👤 Ivor E Campbell
- 👤 Bruce W Gonser
- 👤 Carroll F Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:44
CPC Classifications
C; C23; C23C; C23C10/00; C23C10/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE METHOD OF FORMING REFRACTORY METAL BODIES RESISTANT TO OXIDATION AT TEMPERATURES ABOVE ABOUT 1000* C. WHICH COMPRISES HEATING THE REFRACTORY METAL BODY IN AN INERT ATMOSPHERE TO A TEMPERATURE BETWEEN ABOUT 950* C. AND ABOUT 1400* C., DEPOSITING SILICON ON THE METAL BODY WHILE MAINTAINED AT SAID TEMPERATURE BY PASSING A MIXTURE OF HYDROGEN AND VAPORS OF A SILICON HALIDE OVER THE HEATED METAL BODY, AND HEATING THE COATED METAL BODY TO A TEMPERATURE ABOVE ABOUT 1400* C. AND FOR A TIME SUFFICIENT TO ALLOY THE SILICON WITH THE SURFACE PORTIONS OF THE METAL BODY WHEREBY A SURFACE COASTING CONSISTING ESSENTIALLY OF SAID ALLOY IS FORMED ON SAID METAL BODY.
Claim 2
Independent Claim
111 words
THE METHOD OF FORMING REFRACTORY METAL BODIES RESISTANT TO OXIDATION AT TEMPERATURES ABOVE ABOUT 1000* C. WHICH COMPRISES HEATING THE REFRACTORY METAL BODY IN AN INERT ATMOSPHERE TO A TEMPERATURE BETWEEN ABOUT 950* C. AND ABOUT 1400* C., DEPOSITING SILICON ON THE METAL BODY WHILE MAINTAINED AT SAID TEMPERATURE BY PASSING A MIXTURE OF HYDROGEN AND VAPORS OF A SILICON HALIDE OVER THE HEATED METAL BODY, AND HEATING THE COATED METAL BODY TO A TEMPERATURE ABOVE ABOUT 1400* C. AND FOR A TIME SUFFICIENT TO ALLOY THE SILICON WITH THE SURFACE PORTIONS OF THE METAL BODY WHEREBY A SURFACE COASTING CONSISTING ESSENTIALLY OF SAID ALLOY IS FORMED ON SAID METAL BODY.
References Cited (Backward Citations)
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Cited
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Cited
US2157902A
Cited
US2306222A
Cited
US2501051A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |