Patent US3953398A successfully refreshed from Google Patents.
US3953398A
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Age resistant polymeric compositions
Assignee: Goodyear Tire and Rubber Co
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Filing: 1972-10-26
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Granted: 1976-04-27
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Expires: 1992-10-26
Abstract
Abstract Antioxidants such as 3,5-di tert.butyl-4-hydroxy-cinnamonitrile and ethyl 3,5-di tert.hexyl-4-hydroxycinnamate, age resistant polymers having monomeric age resistors physically combined therewith and age resistant polymeric compositions prepared by free radical polymerization techniques involving the use of said antioxidants as monomers.
Inventors
- 👤 Richard H. Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:35
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/42; C07C45/43; C07C255/00; C07C45/61; C07C45/67; C07C45/68; C07C45/72; C07C45/74; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/26; C08F236/00; C08F236/02; C08F236/04; C08F246/00; C08K; C08K5/00; C08K5/04; C08K5/13
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
An age resistant polymeric composition comprising a polymer susceptible to oxygen degradation having incorporated therin a stabilizing amount of at least one phenolic compound having the following structural formula: ##SPC4## wherein R and R 1 are tertiary alkyl groups having 4 to 8 carbon atoms and wherein X is ##EQU5## wherein R 3 is selected from the group consisting of hydrogen and alkyl groups having from 1 to 4carbon atoms.
Claim 2
Dependent Claim
70 words
An age resistant polymeric composition comprising a polymer susceptible to oxygen degradation having incorporated therin a stabilizing amount of at least one phenolic compound having the following structural formula: ##SPC4## wherein R and R 1 are tertiary alkyl groups having 4 to 8 carbon atoms and wherein X is ##EQU5## wherein R 3 is selected from the group consisting of hydrogen and alkyl groups having from 1 to 4carbon atoms.
Claim 3
Dependent Claim
23 words
The age resistant polymeric composition according to claim 1 wherein R 3 is selected from the group consisting of methyl and ethyl radicals.
Claim 4
Dependent Claim
18 words
The age resistant polymeric composition according to claim 2 wherein R and R 1 are tertiary butyl radicals.
Claim 5
Dependent Claim
14 words
The age resistant polymeric composition according to claim 1 wherein R 3 is ethyl.
Claim 6
Dependent Claim
29 words
The age resistant polymeric composition according to claim 1 wherein the polymer is selected from the group consisting of natural rubber and synthetic polymers prepared from conjugated diene monomers.
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) | 1979-04-27 | 1979-10-27 | 1980-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-27 | 1983-10-27 | 1984-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-27 | 1987-10-27 | 1988-04-27 | $7700.00 | Window Closed / Lapsed |