US2904404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of silicon
Assignee: Raytheon Co
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Filing: 1957-01-09
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Granted: 1959-09-15
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Expires: 1977-01-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Ray C Ellis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:03
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02; C01B33/021; C01B33/027; C01B33/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF PREPARING SILICON COMPRISING THE STEPS OF MAINTAINING A HALOGENATED SILANE COMPOUND AS A GAS IN AN ENVIRONMENT OF HYDROGEN GAS, PASSING SAID GASSES PAST A BODY CHEMICALLY INERT TO SILICON, HEATING SAID BODY TO A SUITABLE TEMPERATURE RANGING FROM AT LEAST THE MELTING POINT OF SILICON TO TEMPERATURES SUBSTANTIALLY ABOVE SAID MELTING POINT TO DECOMPOSED THE SILICON-BEARING GAS IN THE VICINITY OF SAID BODY TO FORM MOLTEN SILICON THERFROM ON SAID BODY, CONTINUOUSLY SEPARATING SAID MOLTEN SILICON FROM THE AREA WHEREIN REACTION IS OCCURRING, AND COLLECTING SAID MOLTEN SILICON FROM SAID BODY WHILE MAINTAINING SAID BODY IN SAID TEMPERATURE RANGE.
Claim 2
Independent Claim
103 words
THE METHOD OF PREPARING SILICON COMPRISING THE STEPS OF MAINTAINING A HALOGENATED SILANE COMPOUND AS A GAS IN AN ENVIRONMENT OF HYDROGEN GAS, PASSING SAID GASSES PAST A BODY CHEMICALLY INERT TO SILICON, HEATING SAID BODY TO A SUITABLE TEMPERATURE RANGING FROM AT LEAST THE MELTING POINT OF SILICON TO TEMPERATURES SUBSTANTIALLY ABOVE SAID MELTING POINT TO DECOMPOSED THE SILICON-BEARING GAS IN THE VICINITY OF SAID BODY TO FORM MOLTEN SILICON THERFROM ON SAID BODY, CONTINUOUSLY SEPARATING SAID MOLTEN SILICON FROM THE AREA WHEREIN REACTION IS OCCURRING, AND COLLECTING SAID MOLTEN SILICON FROM SAID BODY WHILE MAINTAINING SAID BODY IN SAID TEMPERATURE RANGE.
References Cited (Backward Citations)
US2438892A
Cited
US2686864A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |