Patent US2499561A successfully refreshed from Google Patents.
US2499561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of aromatic halosilanes
Assignee: Dow Silicones Corp
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Filing: 1949-02-23
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Granted: 1950-03-07
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Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur J Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:47
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE METHOD WHICH COMPRISES REACTING AN AROMATIC CHLOROHYDROCARBON CONTAINING NUCLEARLY SUBSTITUTED CHLORINE WITH A MONOORGANODICHLOROSILANE OF THE FORMULA RHSICL2, IN WHICH REPRESENTS A MONOVALENT HYDROCARBON RADICAL FREE OF ALIPHATIC UNSATURATION, IN THE PRESENCE OF A CHLORIDE OF THE GROUP CONSISTING OF BORON AND ALUMINUM CHLORIDES AT A TEMPERATURE OF FROM 150* TO 310*C. AT LEAST A PORTION OF THE REACTION MIXTURE BEING IN LIQUID PHASE, WHEREBY TO PRODUCE AN ORGANODICHLOROSILYL DERIVATIVE OF SAID CHLOROHYDROCARBON WITH THE SILICON BONDED DIRECTLY TO THE AROMATIC RING THEREOF.
Claim 2
Independent Claim
84 words
THE METHOD WHICH COMPRISES REACTING AN AROMATIC CHLOROHYDROCARBON CONTAINING NUCLEARLY SUBSTITUTED CHLORINE WITH A MONOORGANODICHLOROSILANE OF THE FORMULA RHSICL2, IN WHICH REPRESENTS A MONOVALENT HYDROCARBON RADICAL FREE OF ALIPHATIC UNSATURATION, IN THE PRESENCE OF A CHLORIDE OF THE GROUP CONSISTING OF BORON AND ALUMINUM CHLORIDES AT A TEMPERATURE OF FROM 150* TO 310*C. AT LEAST A PORTION OF THE REACTION MIXTURE BEING IN LIQUID PHASE, WHEREBY TO PRODUCE AN ORGANODICHLOROSILYL DERIVATIVE OF SAID CHLOROHYDROCARBON WITH THE SILICON BONDED DIRECTLY TO THE AROMATIC RING THEREOF.
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) | 1953-03-06 | 1953-09-05 | 1954-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-06 | 1957-09-05 | 1958-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-06 | 1961-09-05 | 1962-03-07 | $7700.00 | Window Closed / Lapsed |