US2557782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making chlorosilphenanes and products
Assignee: Dow Silicones Corp
•
Filing: 1949-02-23
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Granted: 1951-06-19
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Expires: 1969-02-23
Abstract
No abstract record available.
Inventors
- 👤 Harold A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:14
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C08; C08G; C08G77/00; C08G77/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A METHOD OF PREPARING LINEAR ORGANO SILANE POLYMERS IN WHICH THE SILICON ATOMS ARE LINKED BY PHENYLENE RADICALS AND THE REMAINING VALENCES OF THE SILICON ARE SATISFIED BY CHLORINE ATOMS AND PHENYL RADICALS, WHICH METHOD COMPRISES HEATING PHENYLCHLOROSILANES OF THE FORMULA (C6H5)XSICL4-X WHERE X HAS A VALUE FROM 1.5 TO 2.9 IN LIQUID PHASE AT A TEMPERATURE OF FROM 210* TO 300* C. IN CONTACT WITH FROM 0.001 TO 10 PERCENT BY WEIGHT OF ALUMINUM CHLORIDE BASED UPON THE TOTAL WEIGHT OF THE CHLOROSILANE.
Claim 2
Independent Claim
84 words
A METHOD OF PREPARING LINEAR ORGANO SILANE POLYMERS IN WHICH THE SILICON ATOMS ARE LINKED BY PHENYLENE RADICALS AND THE REMAINING VALENCES OF THE SILICON ARE SATISFIED BY CHLORINE ATOMS AND PHENYL RADICALS, WHICH METHOD COMPRISES HEATING PHENYLCHLOROSILANES OF THE FORMULA (C6H5)XSICL4-X WHERE X HAS A VALUE FROM 1.5 TO 2.9 IN LIQUID PHASE AT A TEMPERATURE OF FROM 210* TO 300* C. IN CONTACT WITH FROM 0.001 TO 10 PERCENT BY WEIGHT OF ALUMINUM CHLORIDE BASED UPON THE TOTAL WEIGHT OF THE CHLOROSILANE.
References Cited (Backward Citations)
US2389477A
Cited
US2352974A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-18 | 1954-12-18 | 1955-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-18 | 1958-12-18 | 1959-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-18 | 1962-12-18 | 1963-06-19 | $7700.00 | Window Closed / Lapsed |