This inventor holds 5 USPTO granted patents and 1 published patent application and 1 EPO patent. Top assignees: Zeon Corporation, Nof Corporation. Active years: 2017-2020.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
5 out of 1,297 
1 out of 344 
Years Active: 2017-2020
Title: Ryuji Ohta: Innovator in Toner Technology
Introduction
Ryuji Ohta is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of toner technology, holding a total of 5 patents. His innovative work focuses on improving the quality and performance of toners used in electrostatic imaging.
Latest Patents
One of Ohta's latest patents is for a yellow toner that boasts excellent pigment dispersibility. This toner achieves high image density while minimizing fogging. The formulation includes a binder resin that is a copolymer, consisting of 67 to 88% by mass of a styrene-based monomer unit and 12 to 33% by mass of an alkyl (meth)acrylate monomer unit. The yellow pigment content ranges from 3 to 15 parts by mass relative to 100 parts by mass of the binder resin. Additionally, the interfacial tension of a mixed solution of the yellow pigment, styrene, and n-butyl acrylate with respect to water is maintained between 5 to 19 mN/m.
Another notable patent involves a toner designed for developing electrostatic images. This toner includes an external additive and colored resin particles that contain a binder resin, a colorant, and softening agents. The colored resin particles utilize a monoester compound A and a monoester compound B as softening agents, with specific mass percentages to ensure optimal performance.
Career Highlights
Throughout his career, Ryuji Ohta has worked with notable companies such as Zeon Corporation and Nof Corporation. His experience in these organizations has allowed him to refine his expertise in toner technology and contribute to advancements in the field.
Collaborations
Ohta has collaborated with several talented individuals, including Azusa Masuda and Munehiro Yamada. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.
Conclusion
Ryuji Ohta's contributions to toner technology have significantly impacted the industry. His innovative patents reflect his dedication to enhancing the quality and efficiency of toners used in electrostatic imaging.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile