Inventor · disambiguated record
Willi Helfer
Also filed as: HELFER WILLI
10 granted patents·1 pending application·70 citations·filing 1996–2010
85Inventor score
Files withBASF AG11
Top patents by PatentIndex Score
11 records- 0189US5808073APreparation and purification of perylene-3,4-dicarbimidesBASF AG·Filed 1996·Granted Sep 15, 1998·40 cites·10 claims
- 0277US6136976AProcess for producing perylene-3, 4-dicarboxylic acid imidesBASF AG·Filed 1997·Granted Oct 24, 2000·18 cites·7 claims
- 0375US7358362B2Method for the production of terylene-3,4:11,12-tetracarboxydiimides by direct synthesisBASF AG·Filed 2005·Granted Apr 15, 2008·2 cites·10 claims
- 0471US7145010B2Tert-alkylphenoxy-substituted polycyclic compoundsBASF AG·Filed 2002·Granted Dec 5, 2006·8 cites·6 claims
- 0563US7550606B29-cyano-substituted perylene-3,4-dicarboxylic acid monoimidesBASF AG·Filed 2008·Granted Jun 23, 2009·0 cites·16 claims
- 0658US7851628B2Conversion of perylene-3,4:9,10-tetracarboximides to a form suitable for use as fluorescent dyesBASF AG·Filed 2008·Granted Dec 14, 2010·0 cites·5 claims
- 0754US7807836B2Preparation of perylen-3,4:9,10-tetracarboxylic dianhydride and also of naphtalene-1,8-dicarboximidesBASF AG·Filed 2007·Granted Oct 5, 2010·0 cites·4 claims
- 0851US7446198B29-Cyano-substituted perylene-3, 4-dicarboxylic monoimidesBASF AG·Filed 2003·Granted Nov 4, 2008·2 cites·11 claims
- 0949US2010218321A1Method for converting perylen-3,4:9,10-tetracarboxylic acid diimides into a form suitable for use as a fluorescent dyeBASF AG·Filed 2010·Application pending·0 cites
- 1043US7753967B2Method for converting perylen-3,4:9,10-tetracarboxylic acid diimides into a form suitable for use as a fluorescent dyeBASF AG·Filed 2003·Granted Jul 13, 2010·0 cites·3 claims
- 1140US7393956B2Method 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-dicarboxylimidesBASF AG·Filed 2003·Granted Jul 1, 2008·0 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →