This inventor holds 3 USPTO granted patents. Top assignees: Hitachi Construction Machinery Co., Ltd., Hitachi Const. Machinery Co., Hitachi, Ltd.. Active years: 1985-1994.
Company Filing History:
2 out of 1,508 
1 out of 1 
1 out of 42,717 
Years Active: 1985-1994
Title: Nobuyoshi Hidao: Innovator in Gas Sulphonitriding Technology
Introduction
Nobuyoshi Hidao is a notable inventor based in Kashiwa, Japan. He has made significant contributions to the field of materials engineering, particularly in the development of methods for gas sulphonitriding. With a total of 3 patents to his name, Hidao's work has advanced the understanding and application of surface treatment technologies.
Latest Patents
Hidao's latest patents focus on innovative methods for enhancing the properties of sliding members through gas sulphonitriding. One of his patents describes a method where a sliding member is sulphonitrided by heating it at temperatures between 480°C and 600°C in the presence of both 10-500 ppm of hydrogen sulfide gas and 20-70 vol % ammonia gas. An alternative method involves a two-step heat treatment process, where the sliding member is first treated at 450°C-540°C, followed by a secondary treatment at a lower temperature after ceasing the ammonia gas supply. These methods result in a sliding member with a FeS₂ layer on its surface, enhancing its durability and performance.
Career Highlights
Throughout his career, Nobuyoshi Hidao has worked with prominent companies such as Hitachi Construction Machinery Co., Ltd. and Hitachi, Ltd. His experience in these organizations has allowed him to apply his innovative ideas in practical settings, contributing to advancements in engineering and manufacturing processes.
Collaborations
Hidao has collaborated with notable colleagues, including Kazuyoshi Hatano and Ken Ichiryu. These partnerships have fostered a collaborative environment that encourages the exchange of ideas and the development of cutting-edge technologies.
Conclusion
Nobuyoshi Hidao's contributions to the field of gas sulphonitriding have established him as a key figure in materials engineering. His innovative methods and collaborative efforts continue to influence the industry, paving the way for future advancements.