US3719696A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Organosilicon polymers containing silacyclobutane structures
Assignee: Dow Silicones UK Ltd
•
Filing: 1971-03-12
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Granted: 1973-03-06
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Expires: 1991-03-12
Abstract
Abstract ORGANOSILICON HOMOPOLYMERS AND COPOLYMERS CONTAINING (O-SI<(-(R''M)-CH2-(R-)CH-CH2-)) 2-M/2 UNITS WHEREIN R IS H OR LOWER ALKYL, R'' IS HYDROCARBYL, FLUOROHYDROCARBYL OR ALKOXYALKYL AND M IS 0 OR 1, ARE PREPARED BY HYDROLYSIS OR COHYDROLYSIS OF SILANES CONTAINING (Y-SI<(-(R''M)-CH2-(R-)CH-CH2-)) 2-M WHERE R, R'' AND M ARE AS ABOVE DEFINED AND Y IS A HYDROLYZABLE ATOM OR GROUP. THESE NEW POLYMERS ARE USEFUL AS WATER REPELLENTS AND COATING COMPOSITIONS ON TEXTILES, GLASS FIBERS AND POWDERY SUBSTRATES AS WELL AS IN MANUFACTURE OF SILICON RUBBERS AND RESINS.
Inventors
- 👤 D Jonas
- 👤 W Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:39
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/0834; C07F7/12; C07F7/18; C07F7/1804; C08; C08G; C08G77/00; C08G77/04
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |