Patent JPS6246762A successfully refreshed from Google Patents.
Patent US2610983A successfully refreshed from Google Patents.
US2610983A
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Prevention of pinking in rubber articles containing di-beta-naphthyl-para-phenylene diamine antioxidant
Assignee: Uniroyal Inc
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Filing: 1949-07-29
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Granted: 1952-09-16
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Expires: 1969-07-29
Abstract
No abstract record available.
Inventors
- 👤 David G Slovin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:36
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; Y; Y10; Y10S; Y10S524/00; Y10S524/925
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A SULFUR-VULCANIZED RUBBER ARTICLE CONTAINING A SMALL AMOUNT OF SYMMETRICAL DI-BETA-NAPHTHYL-PARA-PHENYLENE DIAMINE INCORPORATED BEFORE VULCANIZATION AND EFFECTIVE TO PROTECT THE VULCANIZED RUBBER AGAINST OXIDATION, THE FORMULATION OF SAID VULCANIZED RUBBER ARTICLE BEING SUCH THAT IN THE ABSENCE OF THE HEREINAFTER SPECIFIED 2,5-DITERTIARY BUTYL HYDROQUINONE IT WOULD EXHIBIT AN OBJECTIONABLE TENDENCY TO DEVELOP A VISIBLE PINK DISCOLORATION BY REASON OF THE PRESENCE OF SAID DIAMINE, SAID VULCANIZED RUBBER ARTICLE BEING PROTECTED AGAINST SAID TENDENCY TO DEVELOP SAID VISIBLE PINK DISCOLORATION BY THE PRESENCE THEREIN OF A SMALL AMOUNT OF 2,5-DI-TERTIARY BUTYL HYDROQUINONE INCORPORATED BEFORE VULCANIZATION.
Claim 2
Dependent Claim
94 words
A SULFUR-VULCANIZED RUBBER ARTICLE CONTAINING A SMALL AMOUNT OF SYMMETRICAL DI-BETA-NAPHTHYL-PARA-PHENYLENE DIAMINE INCORPORATED BEFORE VULCANIZATION AND EFFECTIVE TO PROTECT THE VULCANIZED RUBBER AGAINST OXIDATION, THE FORMULATION OF SAID VULCANIZED RUBBER ARTICLE BEING SUCH THAT IN THE ABSENCE OF THE HEREINAFTER SPECIFIED 2,5-DITERTIARY BUTYL HYDROQUINONE IT WOULD EXHIBIT AN OBJECTIONABLE TENDENCY TO DEVELOP A VISIBLE PINK DISCOLORATION BY REASON OF THE PRESENCE OF SAID DIAMINE, SAID VULCANIZED RUBBER ARTICLE BEING PROTECTED AGAINST SAID TENDENCY TO DEVELOP SAID VISIBLE PINK DISCOLORATION BY THE PRESENCE THEREIN OF A SMALL AMOUNT OF 2,5-DI-TERTIARY BUTYL HYDROQUINONE INCORPORATED BEFORE VULCANIZATION.
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) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |