This inventor holds 1 USPTO granted patent. Top assignees: Nippon Oil Fats Co., Ltd., Nissan Motor Company Limited, Shinto Paint Co., Ltd.. Active years: 1992.
Company Filing History:
1 out of 297 
1 out of 13,420 
1 out of 53 Years Active: 1992
Title: Makoto Efumi: Innovator in Composite Paint Film Coatings
Introduction
Makoto Efumi is a notable inventor based in Narashino, Japan. He has made significant contributions to the field of automotive coatings, particularly through his innovative patent related to composite paint film coatings. His work has implications for enhancing the durability and performance of automotive vehicle bodies.
Latest Patents
Efumi holds a patent for a composite paint film coating designed for steel sheets used in automotive vehicle bodies. This composite coating consists of an electrodeposition paint film and an intermediate paint film. The electrodeposition paint film is characterized by a minimum melt viscosity of not less than 0.2 during hardening. It is formed from a cathodic electrodeposition paint composition that includes a cationic thermosetting resin and a cross-linked particulate resin. The particulate resin is created through an addition-polymer process involving compounds with primary amino groups and ethylenic unsaturated groups. The weight ratio of the particulate resin to the cationic thermosetting resin is maintained within a specific range, ensuring optimal performance. The intermediate paint film has a hardening starting time of 5 to 20 minutes, making it efficient for automotive applications.
Career Highlights
Throughout his career, Makoto Efumi has worked with reputable companies such as Shinto Paint Co., Ltd. and Nippon Oil Fats Co., Ltd. His experience in these organizations has allowed him to refine his expertise in paint formulations and coatings technology.
Collaborations
Efumi has collaborated with notable colleagues, including Masaya Kawabata and Hiroyuki Kishi. These partnerships have contributed to the advancement of his research and innovations in the field of coatings.
Conclusion
Makoto Efumi's contributions to composite paint film coatings represent a significant advancement in automotive technology. His innovative approach and dedication to improving paint formulations have the potential to enhance the durability and performance of vehicle bodies.