US3274288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of organopolysiloxane resins
Assignee: Midland Silicones Ltd
•
Filing: 1963-12-24
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Granted: 1966-09-20
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Expires: 1983-12-24
Abstract
No abstract record available.
Inventors
- 👤 Glyn I Harris
- 👤 Hedley S B Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
C; C08; C08G; C08G77/00; C08G77/04; C08G77/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A PROCESS FOR THE PREPARATION OF ORGANOSILICAN COMPOSITIONS HAVING A RATIO OF ORGANIC GROUPS TO SILICON ATOMS IN THE RANGE FROM 1.01 TO 1.85 COMPRISING FORMING A MIXTURE OF THE HYDROLYSIS PRODUCTS OF AT LEAST ONE DIORGANODICHLOROSILANE OF THE FORMULA R2SICI2 AND AT LEAST ONE SILANE OF THE GENERAL FORMULA RSICLNX3-N WHEREIN N HAS A VALUE OF FROM 1 TO 2 INCLUSIVE, R REPRESENTS A MONOVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS AND SUBSTITUTED HYDROCARBON RADICALS AND X IS AN ALKOXY RADICAL WHICH IS LESS EASILY HYDROLYZABLE TAN THE CHLORINE ATOMS UNDER THE CONDITIONS OF THE HYDROLYSIS REACTION, SAID HYDROLYSIS BEING CARRIED OUT UNDER CONDITIONS WHEREIN THE PH VALUE OF THE HYDROLYSIS MEDIUM IS MAINTAINED WITHIN THE RANGE FROM 5.5 TO 9.0 AT A TEMPERATURE OF FROM 0-25*C.
Claim 2
Dependent Claim
131 words
A PROCESS FOR THE PREPARATION OF ORGANOSILICAN COMPOSITIONS HAVING A RATIO OF ORGANIC GROUPS TO SILICON ATOMS IN THE RANGE FROM 1.01 TO 1.85 COMPRISING FORMING A MIXTURE OF THE HYDROLYSIS PRODUCTS OF AT LEAST ONE DIORGANODICHLOROSILANE OF THE FORMULA R2SICI2 AND AT LEAST ONE SILANE OF THE GENERAL FORMULA RSICLNX3-N WHEREIN N HAS A VALUE OF FROM 1 TO 2 INCLUSIVE, R REPRESENTS A MONOVALENT RADICAL SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS AND SUBSTITUTED HYDROCARBON RADICALS AND X IS AN ALKOXY RADICAL WHICH IS LESS EASILY HYDROLYZABLE TAN THE CHLORINE ATOMS UNDER THE CONDITIONS OF THE HYDROLYSIS REACTION, SAID HYDROLYSIS BEING CARRIED OUT UNDER CONDITIONS WHEREIN THE PH VALUE OF THE HYDROLYSIS MEDIUM IS MAINTAINED WITHIN THE RANGE FROM 5.5 TO 9.0 AT A TEMPERATURE OF FROM 0-25*C.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |