US3867467A
Expired / Lapsed
US
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Phenolic antioxidants
Assignee: Goodyear Tire and Rubber Co
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Filing: 1971-12-09
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Granted: 1975-02-18
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Expires: 1991-12-09
Abstract
Abstract Phenolic antioxidants such as 1,1-dimethyl-2-(3,5-di tert.butyl4-hydroxyphenyl)-1-nitroethane and a method of preparing said antitoxidants involving the reaction between a 3,5-di tert.alkyl4-hydroxybenzyl halide; N,N-dialkyl amine or dithiocarbamate such as 3,5-di tert.butyl-4-hydroxybenzyl chloride; 2,6-di tert.butyl4-dimethylamino-methylphenol or 3,5-di tert.butyl-4-hydroxybenzyl N,N-dimethyldithiocarbamate and a nitroalkane such as 2nitropropane.
Inventors
- 👤 Richard H Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:19
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/52; C08F20/54; C08F20/58; C08F236/00; C08F236/02; C08F236/04; Y; Y10; Y10S; Y10S524/00; Y10S524/925; Y10S524/929
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
7 words
A COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 2
Dependent Claim
7 words
A COMPOUND HAVING THE FOLLOWING STRUCTURAL FORMULA:
Claim 3
Dependent Claim
19 words
A compound according to claim 1 selected from the group consisting of 1,1-dimethyl-2-(3,5-di t.butyl-4-hydroxyphenyl)-1-nitroethane; 1-methyl-2-(3,5-di t.butyl-4-hydroxyphenyl)-1-nitroethane and 1-(3,5-di t.butyl-4-hydroxybenzyl)-1-nitropropane.
Claim 4
Dependent Claim
23 words
The compound of claim 1 wherein R and R1 are tertiary butyl radicals, R2 is hydrogen and R3 and R4 are methyl radicals.
References Cited (Backward Citations)
US2151517A
Cited
US3121732A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |