Patent US2875769A successfully refreshed from Google Patents.
US2875769A
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Keratinaceous fiber dye of hydroquinone and either dihydroxyphenylalanine or dihydroxyphenylglycine and method of its use
Assignee: Apod Corp
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Filing: 1957-08-20
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Granted: 1959-03-03
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Expires: 1977-08-20
Abstract
No abstract record available.
Inventors
- 👤 Philip F Rosmarin
- 👤 Pantzer Myron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 19:38
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/44; A61K8/33; A61K8/34; A61K8/347; A61Q; A61Q5/00; A61Q5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
A COLOURED COMPOSITION OF MATTER COMPRISING A WATERDISPERSABLE RACTAN-DYE USEFUL IN THE DYEING OF KERTINACEOUS FIBRES WITH SINGNIFICANT FASTNESS TO LIGHT AND WATER, WHICH DYE RESULTS FROM THE REACTION. IN AN AQUEOUS MEDIUN UNDER ALKALINE CONDITIONS PRODUCTED BY A COMPATIBLE WATER-SOLUBLE ALKALIZING AGENT THAT DISSOLVES ANY OF THE REACTANTS INSUFFICIENTLY SOLUBLE UNDER THE CONDITIONS AND AVOIDS FORMATION OF A PRECIPITATE WITH ANY OF THE REACTION QUINONE AND AT LEAST ONE AMINO ACID MEMBER OF THE CLASS QUINONE AND AT LEAST ONE AMINO ACID MEMBER OF THE CLASS CONSISTING OF A DIHYDROXYPHENYLALANINE HAVING A FORMULA (HO)2C6H3CH2CH(NH2)COOH AND A DIHYDROXYPHENYLGLYCINE HAVING THE FORMULA (HO)2C6H3CH(NH2)COOH, UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE, AND WHEREIN THE HYDROQUINONE IS FROM ABOUT TWO HUNDRED PERCENT BY WEIGHT OF THE AMINO USED.
Claim 2
Dependent Claim
124 words
A COLOURED COMPOSITION OF MATTER COMPRISING A WATERDISPERSABLE RACTAN-DYE USEFUL IN THE DYEING OF KERTINACEOUS FIBRES WITH SINGNIFICANT FASTNESS TO LIGHT AND WATER, WHICH DYE RESULTS FROM THE REACTION. IN AN AQUEOUS MEDIUN UNDER ALKALINE CONDITIONS PRODUCTED BY A COMPATIBLE WATER-SOLUBLE ALKALIZING AGENT THAT DISSOLVES ANY OF THE REACTANTS INSUFFICIENTLY SOLUBLE UNDER THE CONDITIONS AND AVOIDS FORMATION OF A PRECIPITATE WITH ANY OF THE REACTION QUINONE AND AT LEAST ONE AMINO ACID MEMBER OF THE CLASS QUINONE AND AT LEAST ONE AMINO ACID MEMBER OF THE CLASS CONSISTING OF A DIHYDROXYPHENYLALANINE HAVING A FORMULA (HO)2C6H3CH2CH(NH2)COOH AND A DIHYDROXYPHENYLGLYCINE HAVING THE FORMULA (HO)2C6H3CH(NH2)COOH, UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE, AND WHEREIN THE HYDROQUINONE IS FROM ABOUT TWO HUNDRED PERCENT BY WEIGHT OF THE AMINO USED.
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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) | 1962-03-02 | 1962-09-01 | 1963-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-02 | 1966-09-01 | 1967-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-02 | 1970-09-01 | 1971-03-03 | $7700.00 | Window Closed / Lapsed |