US3179623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a monomer having phenoxy and methacrylate groups linked by hydroxy glyceryl groups
Assignee: Individual
•
Filing: 1961-06-26
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Granted: 1965-04-20
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Expires: 1981-06-26
Abstract
No abstract record available.
Inventors
- 👤 Rafael L Bowen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:50
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/16; A; A61; A61K; A61K6/00; A61K6/80; A61K6/884; A61K6/887
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
THE METHOD OF PREPARING A MONOMER POLYMERIZABLE AT NORMAL TEMPERATURES, WHICH COMPRISES MIXING WITH AT LEAST ONE MEMBER OF THE CLASS CONSISTING OF GLYCIDYL ACRYLATE AND GLYCIDYL METHACRYLATE AN AMOUNT OF A BIS-PHENOL CONSISTING ESSENNTIALLY OF 4-4''-DIHYDROXY-DIPHENYL-2,2-PROPANE SUFFICIENT TO PROVIDE SUBSTANTIALLY ONE HYDROXYL RADICAL OF SAID BIS-PHENOL FOR EACH EPOXY RADICAL OF SAID AT LEAST ONE MEMBER, AND ABOUT 0.5% TO ABOUT 1.0% OF DIMETHYL-PARA-TOLUIDENE, HEATING THE MIXTURE TO ABOUT 60* C., STIRRING SAID MIXTURE UNTL SUBSTANTIALLY ALL SAID HYDROXYL RADICALS ARE ETHERFIED WITH SAID EPOXY RADICALS, AND DISCONTINUING SAID HEATING.
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) | 1968-04-19 | 1968-10-19 | 1969-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-19 | 1972-10-19 | 1973-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-19 | 1976-10-19 | 1977-04-20 | $7700.00 | Window Closed / Lapsed |