Location History:
- Monheim, DE (1993 - 2000)
- Langenfeld, DE (1995 - 2007)
Company Filing History:
12 out of 12,157 
2 out of 532 
1 out of 539 Years Active: 1993-2007
Title: Ulrich Liman: Innovator in Diisocyanate Production
Introduction
Ulrich Liman is a prominent inventor based in Langenfeld, Germany. He has made significant contributions to the field of chemical engineering, particularly in the production of diisocyanates and polyisocyanates. With a total of 14 patents to his name, Liman's work has had a substantial impact on the industry.
Latest Patents
Liman's latest patents include innovative processes for the production of di- and polyisocyanates of the diphenylmethane series. One notable invention relates to a method for producing these compounds with defined acidity. This process involves the reaction of aniline and formaldehyde in the presence of an acid catalyst to form di- and polyamines. These amines are then phosgenated to obtain crude di- and polyisocyanates. The invention also details the separation of specific fractions by distillation to achieve desired acidity levels. Another significant patent focuses on producing mixtures of diisocyanates and polyisocyanates with high contents of 4,4'-methylenediphenyl diisocyanate and 2,4'-methylenediphenyl diisocyanate.
Career Highlights
Throughout his career, Ulrich Liman has worked with notable companies such as Bayer Aktiengesellschaft and Bayer Materialscience AG. His experience in these organizations has allowed him to develop and refine his innovative processes in chemical production.
Collaborations
Liman has collaborated with esteemed colleagues in the field, including Josef Sanders and Klaus König. These partnerships have contributed to the advancement of his research and the successful implementation of his patented technologies.
Conclusion
Ulrich Liman's contributions to the field of diisocyanate production exemplify his innovative spirit and dedication to advancing chemical engineering. His patents continue to influence the industry and pave the way for future developments.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.