Company Filing History:
10 out of 10,754 
3 out of 1,289 
Years Active: 1998-2010
Title: Willi Helfer: Innovator in Fluorescent Dyes
Introduction
Willi Helfer is a notable inventor based in Friedelsheim, Germany. He has made significant contributions to the field of chemistry, particularly in the development of fluorescent dyes. With a total of 10 patents to his name, Helfer's work has had a lasting impact on various applications in science and industry.
Latest Patents
Helfer's latest patents include innovative processes for converting perylene-3,4:9,10-tetracarboximides into forms suitable for use as fluorescent dyes. One of his notable inventions involves the preparation of perylene-3,4:9,10-tetracarboxylic dianhydride. This process includes dimerizing a naphthalene-1,8-dicarboximide and hydrolyzing the resulting diimide to create a tetraalkali metal salt of perylene-3,4:9,10-tetracarboxylic acid. His methods utilize specific organic solvents and alkali metal bases to achieve these conversions effectively.
Career Highlights
Throughout his career, Willi Helfer has worked with prominent organizations such as BASF and the Max Planck Society for the Advancement of Science. His experience in these esteemed institutions has allowed him to refine his expertise and contribute to groundbreaking research in his field.
Collaborations
Helfer has collaborated with notable colleagues, including Arno Boehm and Peter Blaschka. These partnerships have fostered a collaborative environment that has led to innovative advancements in chemistry.
Conclusion
Willi Helfer is a distinguished inventor whose work in fluorescent dyes and related chemical processes has significantly influenced the field. His numerous patents and collaborations highlight his dedication to innovation and scientific advancement.