Priority Date: 21.09.07 (FR 20070057753)

Styryl tetrahydroquinolinium thiol/disulfide compound, process for lightening keratin materials using this dye

  • Application ID: EP08164735
  • Status: No opposition filed within time limit


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This EP application has the IPC combination A61 (MEDICAL OR VETERINARY SCIENCE; HYGIENE) and C09 (DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR). We found, that Sperling Fischer & Heyner, Engel Patentanwaltskanzlei, Lederer Keller Patentanwälte Partnerschaft mbB, Vossius & Partner Patentanwälte Rechtsanwälte mbB, Isenbruck Bösl Hörschler LLP and 33 others are specialized in this combination either. For a similar patent, they might be a good choice.


  • 21.09.2007 - Priority Date (FR 20070057753)
  • 01.07.2009 - Publication A1 (EP2075289)
  • 15.08.2012 - Publication B1 (EP2075289)