Patent US3576788A successfully refreshed from Google Patents.
US3576788A
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Polymeric compositions prepared by reacting aralkyl ethers with phenols and curing said compositions with hexamethylenetetramine
Assignee: Midland Silicones Ltd
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Filing: 1967-07-19
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Granted: 1971-04-27
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Expires: 1987-07-19
Abstract
Abstract POLYMER COMPOSITIONS ARE PREPARED BY REACTING AN ARALKYL ETHER OR AN ARALKYL HALIDE WITH A MOLAR EXCESS OF A PHENOLIC COMPOUND, PREFERABLY IN THE PRESENCE OF A FRIEDEL-CRAFTS CATALYST. THE POLYMER COMPOSITIONS MAY BE CROSS-LINKED BY REACTION WITH A HARDENING AGENT FOR NOYOLAC RSINS, FOR EXAMPLE, HEXAMETHYLENE TETRAMINE, AND ARE USEFUL INTHE PREPARATION OF MOULDING COMPOUNDS, LAMINATES AND SOLID LUBRICANTS.
Inventors
- 👤 Glyn Islwyn Harris
- 👤 Frederick Coxon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:30
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G61/00; C08G61/02; C08G61/10; C08G61/12; C08G61/121; C09; C09J; C09J187/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31627; Y10T428/31652
Claims Analysis
Total Claims: 0
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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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |