Location History:
- Tokyo, JA (1976)
- Tokyo, JP (1998)
Company Filing History:
Years Active: 1976-1998
Title: Hisayu Ohsawa: Innovator in Chemical Stabilizers
Introduction
Hisayu Ohsawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of chemistry, particularly in the development of compounds that serve as stabilizers for synthetic polymers. His work has led to the filing of multiple patents, showcasing his innovative approach to chemical applications.
Latest Patents
Hisayu Ohsawa holds 2 patents, with his latest inventions focusing on the following:
1. **Phenylalkanoic acid esters and their use as antioxidants** - This patent involves compounds of a specific formula where R¹ represents an alkyl group having from 1 to 6 carbon atoms.
2. **4-Piperidone derivatives, their preparation and their use as stabilizers** - This invention details 4-Piperidone derivatives that are useful as stabilizers for various synthetic polymers against photo- and thermal deterioration. The preparation involves reactions with aldehydes and dehydration processes.
Career Highlights
Hisayu Ohsawa is associated with Sankyo Company, Limited, where he has been instrumental in advancing chemical research and development. His innovative work has positioned him as a key figure in the industry, contributing to the enhancement of product stability in various applications.
Collaborations
Throughout his career, Ohsawa has collaborated with notable colleagues, including Tomoyuki Kurumada and Keisuke Murayama. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.
Conclusion
Hisayu Ohsawa's contributions to the field of chemistry, particularly in the development of stabilizers for synthetic polymers, highlight his role as an influential inventor. His patents reflect a commitment to innovation and the advancement of chemical applications.