Inventor
PRECHTL FRANK
DE23 patents
⚠️ This page may combine multiple inventors who share the name “PRECHTL FRANK”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
BASF AG
21 patentsUS6468444B1Oct 22, 2002
Chiral compounds and their use as chiral dopants for producing cholesteric liquid crystal compositions
BASF AG56 citations96
US6409995B1Jun 25, 2002
Use of amino-substituted hydroxybenzophenones as photostable UV filters in cosmetic and pharmaceutical preparations
BASF AG69 citations93
US6699405B2Mar 2, 2004
Polymerizable liquid crystals
BASF AG26 citations92
US6159455ADec 12, 2000
Dimeric α-alkylstyrene derivatives as photostable UV filters in cosmetic and pharmaceutical preparations
BASF AG50 citations92
US6793986B2Sep 21, 2004
Polymerizable liquid crystals
BASF AG10 citations74
US6485527B1Nov 26, 2002
Use of reactive dyes for dyeing hair
BASF AG11 citations74
US6410698B1Jun 25, 2002
Reactive dyes with a combination anchor
BASF AG10 citations74
US6159454ADec 12, 2000
Use of cholesteric liquid-crystalline polymers as UV screens in cosmetic and pharmaceutical preparations
BASF AG15 citations74
US6605235B1Aug 12, 2003
Cholesteric layered material having an improved color impression, and the production thereof
BASF AG10 citations73
US6616990B2Sep 9, 2003
Chiral 1, 3-dioxane compounds
BASF AG8 citations72
US6569355B1May 27, 2003
Chiral compounds, and their use as chiral dopants for the preparation of cholesteric liquid-crystalline compositions
BASF AG7 citations72
US6850310B1Feb 1, 2005
Cholesteric layered material having improved color stability, and the production thereof
BASF AG8 citations71
US6603014B1Aug 5, 2003
Use of cyclic enamines as light protection agents
BASF AG2 citations63
US6413503B1Jul 2, 2002
Use of cyclic enamines as light protection agents
BASF AG5 citations63
US6278025B1Aug 21, 2001
Process for the preparation of substituted dibenzoylmethane compounds
BASF AG4 citations62
US7258902B2Aug 21, 2007
Chiral 3,4-dihydro-2H-pyran compounds
BASF AG4 citations61
US6712992B2Mar 30, 2004
Liquid-crystalline composition of matter
BASF AG2 citations61
US7998314B2Aug 16, 2011
Method for the production of paper, cardboard and card
BASF AG6 citations60
US6695977B2Feb 24, 2004
Use of chiral, uncharged metal compounds as dopants for liquid-crystalline materials
BASF AG3 citations56
US6524560B1Feb 25, 2003
Use of substituted vinyltetrahydronaphthalenes and vinyl-benzotetrahydropyrans as light protection agents
BASF AG1 citations52
US6680390B2Jan 20, 2004
Use of substituted vinyl-tetrahydronaphthalenes and vinyl-benzotetrahydropyrans as light protection agents
BASF AG0 citations47