US2556462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of halosilanes
Assignee: Dow Chemical Co
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Filing: 1948-01-05
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Granted: 1951-06-12
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Expires: 1968-01-05
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Barry
- 👤 Donald E Hook
- 👤 Pree Lee De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:12
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/121; C07F7/122
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS WHICH COMPRISES REACTING A FUSED RING AROMATIC HYDROCARBON OF THE GROUP CONSISTING OF NAPHTHALENE, DIHYDRONAPHTHALENE, ALPHAMETHYLNAPHTHALENE, BETA - METHYLNAPHTHALENE, ANTHRACENE, PHENANTHRENE AND FLUORENE, WITH A POLYHALOMONOHYDROMONOSILANE OF THE GENERAL FORMULA RNHSICL3-N, IN WHICH R REPRESENTS A MONOVALENT HYDROCARBON RADICAL FREE OF OF ALIPHATIC UNSATURATION AND N HAS A VALUE OF FROM 0 TO 1 INCLUSIVE, AT A TEMPERATURE OF AT LEAST 300* C. UNDER PRESSURE SUFFICIENT THAT AT LEAST A PORTION OF THE REACTION MIXTURE IS IN A CONDENSED PHASE, WHEREBY THERE IS PRODUCED AN ORGANOHALOSILANE IN WHICH ONE VALENCE OF THE SILICON ATOM IS SATISFIED BY DIRECT LINKAGE TO A CARBON ATOM IN A FUSED RING STRUCTURE.
Claim 2
Dependent Claim
110 words
THE PROCESS WHICH COMPRISES REACTING A FUSED RING AROMATIC HYDROCARBON OF THE GROUP CONSISTING OF NAPHTHALENE, DIHYDRONAPHTHALENE, ALPHAMETHYLNAPHTHALENE, BETA - METHYLNAPHTHALENE, ANTHRACENE, PHENANTHRENE AND FLUORENE, WITH A POLYHALOMONOHYDROMONOSILANE OF THE GENERAL FORMULA RNHSICL3-N, IN WHICH R REPRESENTS A MONOVALENT HYDROCARBON RADICAL FREE OF OF ALIPHATIC UNSATURATION AND N HAS A VALUE OF FROM 0 TO 1 INCLUSIVE, AT A TEMPERATURE OF AT LEAST 300* C. UNDER PRESSURE SUFFICIENT THAT AT LEAST A PORTION OF THE REACTION MIXTURE IS IN A CONDENSED PHASE, WHEREBY THERE IS PRODUCED AN ORGANOHALOSILANE IN WHICH ONE VALENCE OF THE SILICON ATOM IS SATISFIED BY DIRECT LINKAGE TO A CARBON ATOM IN A FUSED RING STRUCTURE.
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) | 1954-06-11 | 1954-12-11 | 1955-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-11 | 1958-12-11 | 1959-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-11 | 1962-12-11 | 1963-06-12 | $7700.00 | Window Closed / Lapsed |