This inventor holds 3 USPTO granted patents and 2 published patent applications. Top assignees: Eneos Corporation, Sanyo Chemical Industries, Ltd.. Active years: 2025-2026.
Company Filing History:
3 out of 152 
1 out of 359 
Years Active: 2025-2026
Title: Innovations by Yuma Seki
Introduction
Yuma Seki is a notable inventor based in Tokyo, Japan. He has made significant contributions to the field of refrigeration technology. With a total of 3 patents to his name, Seki's work focuses on improving the efficiency and effectiveness of refrigerating machine oils.
Latest Patents
Seki's latest patents include a refrigerating machine oil that ensures the residual amount of an anti-wear agent. This innovative oil comprises an ester of a polyhydric alcohol and a fatty acid with 14 to 20 carbon atoms as a base oil, along with an anti-wear agent. The fatty acid includes both unsaturated fatty acids with one carbon-carbon unsaturated bond and those with two or more carbon-carbon unsaturated bonds. Notably, the proportion of the unsaturated fatty acid with two or more carbon-carbon unsaturated bonds is limited to 20% by mole based on the total amount of the unsaturated fatty acid. Another significant patent involves a viscosity index improver containing a copolymer that includes fluorine atom-containing monomers. This copolymer has a specific solubility parameter and mass ratio of the monomers, enhancing its application in refrigeration.
Career Highlights
Throughout his career, Yuma Seki has worked with prominent companies such as Eneos Corporation and Sanyo Chemical Industries, Ltd. His experience in these organizations has contributed to his expertise in the field of refrigeration technology.
Collaborations
Seki has collaborated with notable coworkers, including Hidetoshi Ogata and Tatsuki Nakajima. These partnerships have likely fostered innovation and development in his projects.
Conclusion
Yuma Seki's contributions to refrigeration technology through his patents and collaborations highlight his role as an influential inventor in the industry. His work continues to impact the efficiency of refrigerating machine oils and related technologies.