US3787350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenol-aralkyl ether resins
Assignee: Solvay Solutions UK Ltd
•
Filing: 1972-01-19
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Granted: 1974-01-22
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Expires: 1992-01-19
Abstract
Abstract POLYMERIC MATERIAL ARE KNOWN TO BE MADE BY REACTING TOGETHER A PHENOLIC MATERIAL AND AN ARALKYL ETHER OF THE GENERAL FORMULA R''(-(CH2OR))N WHERE R'' IS AN AROMATIC HYDROCARBON OR HYDROCARBON ETHER RADICAL AND A IS 2 OR 3. THE COLD FLOW PROPERTIES OF THE POLYMERS CAN BE IMPROVED IF THEIR PRODUCTION IS CARRIED OUT USING A COPPER, MERCURIC, MERCUROUS OR SILVER SALT OR A SODIUM HYDROGEN SULPHATE AS CATALYST. POLYMERS MADE BY THIS METHOD ARE PARTICULARLY SUITABLE FOR USE IN MOULDING COMPOUNDS OR COATING MATERIALS FOR APPLICATION BY FLUIDIZED BED TECHNIQUES.
Inventors
- 👤 G Harris
- 👤 A Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:16
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/34; C08G65/38; C08G65/40; C08G65/4087
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) | 1977-01-21 | 1977-07-23 | 1978-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-21 | 1981-07-23 | 1982-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-21 | 1985-07-23 | 1986-01-22 | $7700.00 | Window Closed / Lapsed |