Invention Grant
- Patent Title: Oxidative dye couplers with novel auxochrome substituents and azomethine dyes and leuco forms thereof
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Application No.: US16487971Application Date: 2018-08-08
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Publication No.: US11339295B2Publication Date: 2022-05-24
- Inventor: Bryan P. Murphy , Guiru Zhang , Aaron D. Bailey , Megan E. Bucks
- Applicant: WELLA INTERNATIONAL OPERATIONS SWITZERLAND SÀRL
- Applicant Address: CH Petit-Lancy
- Assignee: WELLA INTERNATIONAL OPERATIONS SWITZERLAND SÀRL
- Current Assignee: WELLA INTERNATIONAL OPERATIONS SWITZERLAND SÀRL
- Current Assignee Address: CH Petit-Lancy
- Agency: Dennemeyer & Associates, LLC
- Agent Victoria Friedman
- International Application: PCT/US2018/045751 WO 20180808
- International Announcement: WO2019/032671 WO 20190214
- Main IPC: C09B55/00
- IPC: C09B55/00 ; A61K8/41 ; A61K8/49 ; A61Q5/10
Abstract:
The present invention concerns an auxochrome substituent for an oxidative dye coupler. The auxochrome substituent enables ready developer reaction with the coupler to form azomethine and leuco dyes. Manipulation of the auxochrome substituent enables a bathochromic or hypsochromic shift of the light absorbance by the azomethine dye formed with the auxochrome substituted coupler.
Public/Granted literature
- US20200024455A1 OXIDATIVE DYE COUPLERS WITH NOVEL AUXOCHROME SUBSTITUENTS AND AZOMETHINE DYES AND LEUCO FORMS THEREOF Public/Granted day:2020-01-23
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