Location History:
- Fujisawa, JA (1978)
- Yokohama, JP (1991 - 1992)
Company Filing History:
Years Active: 1978-1992
Title: Ryuichiro Tsumura: Innovator in Maleimide Preparation
Introduction
Ryuichiro Tsumura is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of chemistry, particularly in the preparation of N-substituted maleimides. With a total of 3 patents to his name, Tsumura's work has advanced the understanding and application of maleimide compounds.
Latest Patents
Tsumura's latest patents include innovative processes for the preparation of N-substituted maleimides. One of his patents details a method that involves heat-dehydration and dehydrating imidization of N-substituted maleamic acids. This process is conducted under azeotropic distillation of generated water in a solvent mixture that includes a solvent capable of forming a water azeotrope and an organic aprotic polar solvent. A zinc salt of a maleamic acid, metallic zinc, or a zinc compound serves as the catalyst in this reaction system.
Another patent focuses on the use of tin catalysts for the same preparation process. This method also employs heat-dehydration and dehydrating imidization of N-substituted maleamic acids under similar conditions, but utilizes metallic tin, tin oxide, a tin salt of a maleamic acid, or a tin compound as the catalyst.
Career Highlights
Ryuichiro Tsumura is currently employed at Mitsui Toatsu Chemicals, Incorporated, where he continues to innovate in the field of chemical processes. His work has not only contributed to the company's portfolio but has also enhanced the overall understanding of maleimide chemistry.
Collaborations
Throughout his career, Tsumura has collaborated with esteemed colleagues such as Teruo Muraishi and Toru Takahashi. These collaborations have fostered a productive environment for research and development in their field.
Conclusion
Ryuichiro Tsumura's contributions to the preparation of N-substituted maleimides highlight his innovative spirit and dedication to advancing chemical processes. His patents reflect a deep understanding of the complexities involved in maleimide synthesis, making him a significant figure in the field.
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.