Location History:
- Kodaira, JP (2009)
- Tokyo, JP (2007 - 2017)
Company Filing History:
11 out of 1,237 
3 out of 61 
2 out of 308 
Years Active: 2007-2025
Title: The Innovative Mind of Hisashi Kurokawa
Introduction
Hisashi Kurokawa is a renowned inventor based in Tokyo, Japan. With an impressive portfolio of 14 patents, he has made significant contributions to the fields of materials science and toner production. His innovative ideas reflect his commitment to enhancing product performance in challenging environments.
Latest Patents
Hisashi Kurokawa's recent patents showcase his expertise in developing advanced materials. One of his noteworthy inventions is a novel type of hollow particles designed to perform excellently in high-humidity environments while maintaining low relative permittivity. These hollow particles consist of a shell containing a specific resin and a hollow core, exhibiting a void ratio of 60% or more and a relative permittivity of 1.6 or less at a frequency of 1 MHz.
Another remarkable patent developed by Kurokawa includes a method for producing a negatively-chargeable toner. This toner is characterized by a narrow particle diameter distribution and excellent properties such as low-temperature fixability and heat-resistant shelf stability. It comprises colored resin particles that include a binder resin, a colorant, a charge control agent, and a softening agent, showcasing Kurokawa's dedication to improving printing technologies.
Career Highlights
Throughout his career, Hisashi Kurokawa has worked with prominent companies, including Zeon Corporation and Bridgestone Corporation. His contributions in these organizations have solidified his reputation as an influential inventor in his field. His work not only reflects cutting-edge technology but also addresses practical challenges faced in industrial applications.
Collaborations
Kurokawa has collaborated with notable colleagues, such as Yasuhiro Suzuki and Katsumi Tashiro. These partnerships have fostered an environment of creativity and technological advancement, leading to the successful development of various innovative products.
Conclusion
In summary, Hisashi Kurokawa stands out as a brilliant inventor whose continuous innovations have significantly influenced material science and printing industries. His expertise in creating advanced products like hollow particles and negatively-chargeable toners underlines the importance of innovation in addressing modern challenges. As he continues to develop new technologies, Kurokawa undoubtedly remains a key figure in the landscape of invention.