US2621111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of silicon chlorides
Assignee: HONORARY ADVISORY COUNCIL FOR SCIENTIFIC AND INDUSTRIAL RESEARCH
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Filing: 1947-08-11
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Granted: 1952-12-09
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Expires: 1967-08-11
Abstract
No abstract record available.
Inventors
- 👤 Stedman Donald Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:46
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
A METHOD OF PRODUCING HIGH YIELDS OF DISILICON HEXACHLORIDE AND ITS HIGHER HOMOLOGUES WHICH COMPRISES REACTING AT LEAST ONE OF A GROUP CONSISTING OIF SILICON AND FERROSILICON WITH CHLORINE IN THE PRESENCE OF A CATALYST WHICH IS A CHLORINE OF AT LEAST ONE OF A GROUP CONSISTING OF AMMONIA AND THE METALS OF GROUPS I AND II, COLUMN A OF THE PERIODIC TABLE AND MAINTAINING THE TEMPERATURE OF REACTION BELOW 250* C. AND NOT LESS THAN 140* C. TO AVOID LOCAL IGNITION OF THE SILICON.
Claim 2
Independent Claim
85 words
A METHOD OF PRODUCING HIGH YIELDS OF DISILICON HEXACHLORIDE AND ITS HIGHER HOMOLOGUES WHICH COMPRISES REACTING AT LEAST ONE OF A GROUP CONSISTING OIF SILICON AND FERROSILICON WITH CHLORINE IN THE PRESENCE OF A CATALYST WHICH IS A CHLORINE OF AT LEAST ONE OF A GROUP CONSISTING OF AMMONIA AND THE METALS OF GROUPS I AND II, COLUMN A OF THE PERIODIC TABLE AND MAINTAINING THE TEMPERATURE OF REACTION BELOW 250* C. AND NOT LESS THAN 140* C. TO AVOID LOCAL IGNITION OF THE SILICON.
References Cited (Backward Citations)
DE375713C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |