US3554698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis of organic silicates to produce polymers and resins
Assignee: OI Glass Inc
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Filing: 1966-02-01
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Granted: 1971-01-12
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Expires: 1986-02-01
Abstract
Abstract POLYMERIC ORGANOSILOXANES WHICH ARE CLEAR AND MAY BE EITHER FLEXIBLE OR RIGID, HARD, SOLID MATERIALS CONTAINING ONLY SILICON-OXYGEN LINKAGES ARE FORMED BY HYDROLYSIS OF ALKYL OR ARYL ORTHOSILICATES IN THE PRESENCE OF WATER, A MINERAL ACID, AND A SOLVENT TO FORM A SINGLE PHASE SYSTEM. THE MIXTURE IS REFLUXED UNTIL THE REACTION IS ESSENTIALLY COMPLETE AND THEN AT LEAST A PORTION OF THE SOLVENT IS REMOVED WHILE AVOIDING GELATION OF THE RESULTING PREPOLYMER. SUBSEQUENTLY, THE PREPOLYMER CAN BE CAST AND CURED TO PRODUCE THE SOLID CLEAR POLYMERIC PRODUCT.
Inventors
- 👤 Alfred J Burzynski
- 👤 Judith A Walmsley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:57
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |