US2803616A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing organopolysiloxanes
Assignee: Dow Silicones Corp
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Filing: 1954-06-24
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Granted: 1957-08-20
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Expires: 1974-06-24
Abstract
No abstract record available.
Inventors
- 👤 Harold A Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:02
CPC Classifications
C; C08; C08G; C08G77/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD WHICH COMPRISES HYDROLYZING A SILANE OF THE FORMULA RNSIX4-N WHERE R IS SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS AND HALOGENATAED MONOVALENT HYDROCARBON RADICALS, X IS A HYDROLYZABLE GROUP AND N HAS AN AVERAGE VALUE FROM 1 TO 2 INCLUSIVE, IN A PHENYLETHYLENE OF THE GROUP CONSISTING OF STYRENE, A-METHYLSTYRENE, CHLOROSTYRENE,BROMOSTYRENE, VINYLTOLUENE AND DIVINYLBENZENE IN AMOUNT SO THAT THE HYDROLYSIS PRODUCT IS IN SOLUTION IN THE PHENYLETHYLENE AND THEREAFTER SEPARATING THE PHENYLETHYLENE SOLUTION FROM THE AQUEOUS PHASE AND FROM ANY HYDROLYSIS BYPRODUCTS.
Claim 2
Independent Claim
86 words
THE METHOD WHICH COMPRISES HYDROLYZING A SILANE OF THE FORMULA RNSIX4-N WHERE R IS SELECTED FROM THE GROUP CONSISTING OF MONOVALENT HYDROCARBON RADICALS AND HALOGENATAED MONOVALENT HYDROCARBON RADICALS, X IS A HYDROLYZABLE GROUP AND N HAS AN AVERAGE VALUE FROM 1 TO 2 INCLUSIVE, IN A PHENYLETHYLENE OF THE GROUP CONSISTING OF STYRENE, A-METHYLSTYRENE, CHLOROSTYRENE,BROMOSTYRENE, VINYLTOLUENE AND DIVINYLBENZENE IN AMOUNT SO THAT THE HYDROLYSIS PRODUCT IS IN SOLUTION IN THE PHENYLETHYLENE AND THEREAFTER SEPARATING THE PHENYLETHYLENE SOLUTION FROM THE AQUEOUS PHASE AND FROM ANY HYDROLYSIS BYPRODUCTS.
References Cited (Backward Citations)
US2607755A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |