Location History:
- Yokohama, JP (1996)
- Kanagawa, JP (1996)
Company Filing History:
2 out of 130 
2 out of 13,415 
Years Active: 1996
Title: **Sumio Yokoo: Innovator in Refrigerant Technology**
Introduction
Sumio Yokoo is a renowned inventor hailing from Yokohama, Japan. He has made significant contributions to the field of refrigeration technology, specifically focusing on innovations that enhance the efficiency and performance of compressors. With a total of two patents to his name, Yokoo continues to be a pivotal figure in the development of modern refrigerant systems.
Latest Patents
Yokoo's latest patents showcase his expertise in working fluid compositions for HFC refrigerant compressors. The first patent entails a working fluid composition for a compression-type refrigerator, which includes:
(A) a refrigerant composed of ammonia or at least one hydrofluorocarbon containing no chlorine and having no more than two carbon atoms; and
(B) a lubricant comprising 100 parts by weight of synthetic oil combined with 0.5 to 10.0 parts by weight of at least one benzotriazole derivative. This innovative lubricant formulation aims to improve the efficiency and longevity of refrigeration systems.
His second patent addresses lubricating oils for fluorocarbon compressors, featuring a main ingredient based on a specific chemical formula designed to optimize performance in various environmental conditions.
Career Highlights
Sumio Yokoo has worked with notable companies, including Japan Energy Corporation and Nissan Motor Company Limited. His career has been marked by a commitment to advancing technology in the energy and automotive sectors. His work has significantly contributed to the development of sustainable practices within these industries.
Collaborations
Throughout his career, Yokoo has collaborated with esteemed colleagues, including Takashi Kaimai and Hiroki Tawaki. Their collective efforts have enabled them to address complex challenges in refrigerant technology, ultimately leading to innovations that benefit both manufacturers and consumers alike.
Conclusion
Sumio Yokoo's contributions to the field of refrigeration and lubricating technologies reflect his dedication to innovation and sustainability. His patents not only demonstrate his technical expertise but also highlight the importance of collaboration within the industry. As refrigeration technology continues to evolve, Yokoo's work remains an essential part of that journey.