US4394476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diester antioxidants
Assignee: Goodyear Tire and Rubber Co
•
Filing: 1982-07-09
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Granted: 1983-07-19
•
Expires: 2002-07-09
Abstract
Abstract Esters of alkyl thiomercaptophenols, such as bis[2-(3,5-ditertiary butyl-4-hydroxyphenylthio)-1-methylethyl]thiodipropionate, used as antioxidants to stabilize polymers against oxidated degradation.
Inventors
- 👤 Kirkwood S. Cottman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:13
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/36; C08K5/37; C08K5/375
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
48 words
A polymer susceptible to oxidative degradation having incorporated therein a stabilizing amount of a compound having the following structural formula: ##STR7## wherein R is an alkylene radical containing 2 to 10 carbon atoms, a phenylene radical, or a radical of the structural formula: --CH.sub.2 --CH.sub.2 --S--CH.sub.2 CH.sub.2 --.
Claim 2
Dependent Claim
48 words
A polymer susceptible to oxidative degradation having incorporated therein a stabilizing amount of a compound having the following structural formula: ##STR7## wherein R is an alkylene radical containing 2 to 10 carbon atoms, a phenylene radical, or a radical of the structural formula: --CH.sub.2 --CH.sub.2 --S--CH.sub.2 CH.sub.2 --.
Claim 3
Dependent Claim
15 words
The polymer according to claim 1 wherein R is the radical: --CH.sub.2 --CH.sub.2 --S--CH.sub.2 --CH.sub.2.
Claim 4
Dependent Claim
12 words
The polymer according to claim 1 wherein R is a phenylene radical.
Claim 5
Dependent Claim
18 words
The polymer according to claim 1 wherein R is an alkylene radical of 2 to 10 carbon atoms.
Claim 6
Dependent Claim
16 words
The polymer according to claim 1 wherein the hydroxyl groups is para to the sulfur atom.
References Cited (Backward Citations)
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US3810929A
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US3751483A
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US4132702A
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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) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |