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US3344031A
Expired / Lapsed
US
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N, n-disubstituted isopicramic acid salts for dyeing human hair
Assignee: Lever Brothers Co
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Filing: 1963-12-11
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Granted: 1967-09-26
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Expires: 1983-12-11
Abstract
No abstract record available.
Inventors
- 👤 Bartoszewicz Jerzy Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:50
CPC Classifications
A; A61; A61K; A61K8/00; A61K8/18; A61K8/30; A61K8/40; A61K8/41; A61K8/418; A61Q; A61Q5/00; A61Q5/06; A61Q5/065
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS OF DYEING HUMAN HAIR WHICH COMPRISES APPLYING TO THE HAIR AN AQUEOUS SOLUTION HAVING A PH OF FROM 2 TO 9 OF AT LEAST ONE DIRECT DYE OF THE FORMULA: 1,3-DI(O2N-),2-(M-O-),5-(R1-N(-R2)-)-BENZENE WHERE: M IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN ALKALI AND ALKALINE EARTH METALS AND AMMONIUM AND ALKYLAMMONIUM, HYDROXYALKYLAMMONIUM AND AMINOALKYLAMMONIUM; R1 IS SELECTED FROM THE CLASS CONSISTING OF ALKYL HAVING UP TO 6 CARBON ATOMS AND HYDROXYALKYL HAVING UP TO 4 CARBON ATOMS; AND R2 IS HYDROXYALKYL HAVING UP TO 4 CARBON ATOMS.
Claim 2
Dependent Claim
88 words
A PROCESS OF DYEING HUMAN HAIR WHICH COMPRISES APPLYING TO THE HAIR AN AQUEOUS SOLUTION HAVING A PH OF FROM 2 TO 9 OF AT LEAST ONE DIRECT DYE OF THE FORMULA: 1,3-DI(O2N-),2-(M-O-),5-(R1-N(-R2)-)-BENZENE WHERE: M IS SELECTED FROM THE CLASS CONSISTING OF HYDROGEN ALKALI AND ALKALINE EARTH METALS AND AMMONIUM AND ALKYLAMMONIUM, HYDROXYALKYLAMMONIUM AND AMINOALKYLAMMONIUM; R1 IS SELECTED FROM THE CLASS CONSISTING OF ALKYL HAVING UP TO 6 CARBON ATOMS AND HYDROXYALKYL HAVING UP TO 4 CARBON ATOMS; AND R2 IS HYDROXYALKYL HAVING UP TO 4 CARBON ATOMS.
References Cited (Backward Citations)
GB889327A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |