Patent US4168387A successfully refreshed from Google Patents.
US4168387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Esters of polyphenolic compounds as built-in antioxidants
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1975-08-06
•
Granted: 1979-09-18
•
Expires: 1995-08-06
Abstract
Abstract This invention concerns a method for the preparation of polyphenolic esters for use as built-in antioxidants.
Inventors
- 👤 Kirkwood S. Cottman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:54
CPC Classifications
C; C08; C08L; C08L57/00; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/26; C08F20/30; C08G; C08G61/00; C08G65/00; C08G65/34; C08G65/48
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
84 words
The reaction product of a polyphenolic compound selected from the group consisting of 2,6-bis-(2-hydroxy-3-tert.butyl-5-methylbenzyl)-4-methylphenol; 2,2'-methylene-bis-(4-methyl-6-tert.butylphenol); 2,2'-methylene-bis-(4-ethyl-6-tert.butylphenol); and 2,6-bis-(2-hydroxy-3-tert.butyl-5-ethyl benzyl)-4-ethylphenol, with an ester forming compound of the general formula ##STR3## wherein R 3 is selected from the group consisting of hydrogen and alkyl radicals having from 1 to 4 carbon atoms, R 4 is selected from the group consisting of hydrogen and alkyl radicals having from 1 to 4 carbon atoms, and wherein A is selected from the group consisting of chlorine, iodine and bromine.
Claim 2
Dependent Claim
84 words
The reaction product of a polyphenolic compound selected from the group consisting of 2,6-bis-(2-hydroxy-3-tert.butyl-5-methylbenzyl)-4-methylphenol; 2,2'-methylene-bis-(4-methyl-6-tert.butylphenol); 2,2'-methylene-bis-(4-ethyl-6-tert.butylphenol); and 2,6-bis-(2-hydroxy-3-tert.butyl-5-ethyl benzyl)-4-ethylphenol, with an ester forming compound of the general formula ##STR3## wherein R 3 is selected from the group consisting of hydrogen and alkyl radicals having from 1 to 4 carbon atoms, R 4 is selected from the group consisting of hydrogen and alkyl radicals having from 1 to 4 carbon atoms, and wherein A is selected from the group consisting of chlorine, iodine and bromine.
Claim 3
Dependent Claim
25 words
The reaction product as described in claim 1 wherein the ester forming compound is selected from the group consisting of acryloyl chloride and methacryloyl chloride.
Claim 4
Dependent Claim
23 words
A reaction product as recited in claim 2 selected from the group consisting of 2-(2-hydroxy-3-t.-butyl-5-ethylbenzyl)-4-ethyl-6-t.-butyl phenylmethacrylate; 2-(2-hydroxy-3-t.butyl-5-methylbenzyl)-4-methyl-6-t.butyl phenylmethacrylate; 2,6-bis-(2-hydroxy-3-t.butyl-5-methylbenzyl)-4-methyl phenylmethacrylate; and 2-(2-hydroxy-3-t.butyl-5-methylbenzyl)-4-methyl-6-t.butyl phenylacrylate.
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) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |