WH

Willi Helfer

Basf Se: 10 patents #1,659 of 13,826Top 15%
Overall (All Time): #520,172 of 4,157,543Top 15%
10
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
7851628 Conversion of perylene-3,4:9,10-tetracarboximides to a form suitable for use as fluorescent dyes Peter Erk, Simone Schaefer, Arno Boehm, Peter Blaschka, Harald Arms 2010-12-14
7807836 Preparation of perylen-3,4:9,10-tetracarboxylic dianhydride and also of naphtalene-1,8-dicarboximides Bernhard Dung, Felix Mueller, Arno Boehm, Volker Weyrauch, Georg Henning 2010-10-05
7753967 Method for converting perylen-3,4:9,10-tetracarboxylic acid diimides into a form suitable for use as a fluorescent dye Peter Erk, Simone Schaefer, Arno Boehm, Peter Blaschka, Harald Arms 2010-07-13
7550606 9-cyano-substituted perylene-3,4-dicarboxylic acid monoimides Arno Boehm, Peter Blaschka, Dirk Hammel, Peter Schlichting, Klaus Muellen 2009-06-23
7446198 9-Cyano-substituted perylene-3, 4-dicarboxylic monoimides Arno Boehm, Peter Blaschka, Dirk Hammel, Peter Schlichting, Klaus Muellen 2008-11-04
7393956 Method for the production of perylen-3,4:9,10-tetracarboxylic acid diimides and perylen-3,4:9,10-tetracarboxylic acid dianhydride and naphtalene-1,8-dicarboxylimides Bernhard Dung, Felix Mueller, Arno Boehm, Volker Weyrauch, Georg Henning 2008-07-01
7358362 Method for the production of terylene-3,4:11,12-tetracarboxydiimides by direct synthesis Martin Koenemann, Arno Boehm, Juergen Romeis, Jianqiang Qu, Klaus Muellen 2008-04-15
7145010 Tert-alkylphenoxy-substituted polycyclic compounds Arno Boehm, Georg Beck, Matthias Krieger, Peter Erk 2006-12-05
6136976 Process for producing perylene-3, 4-dicarboxylic acid imides Arno Boehm, Harald Arms, Georg Henning 2000-10-24
5808073 Preparation and purification of perylene-3,4-dicarbimides Arno Bohm 1998-09-15