Location History:
- Yokoyama, JP (1997)
- Yokohama, JP (1999)
Company Filing History:
1 out of 1,788 
1 out of 1,379 
Years Active: 1997-1999
Title: Hitoshi Ishigaki: Innovator in Acrylamide Polymers
Introduction
Hitoshi Ishigaki is a notable inventor based in Yokohama, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the development of acrylamide polymers. His innovative work has led to advancements that are beneficial in various industrial applications.
Latest Patents
Hitoshi Ishigaki holds 2 patents related to acrylamide polymers. His latest patents focus on an acrylamide polymer that possesses a weight-average molecular weight ranging from 1,500,000 to 10,000,000. Additionally, the polymer has a weight-average inertial radius between 30 to 150 nm, with the ratio of the weight-average inertial radius to the weight-average molecular weight being 0.00004 or smaller. The aqueous solution of this acrylamide polymer has a polymer concentration ranging from 22 to 60%, a Brookfield viscosity at 25°C of 50,000 cps or smaller, and a weight-average molecular weight from 500,000 to 10,000,000. These polymers are particularly useful as paper strength agents.
Career Highlights
Throughout his career, Hitoshi Ishigaki has worked with prominent companies such as Mitsui Chemicals, Inc. and Mitsui Toatsu Chemicals, Incorporated. His experience in these organizations has allowed him to refine his expertise in polymer chemistry and contribute to various innovative projects.
Collaborations
Hitoshi has collaborated with notable coworkers, including Hirotoshi Doki and Toshiki Oyanagi. These collaborations have further enriched his work and have led to significant advancements in the field of acrylamide polymers.
Conclusion
Hitoshi Ishigaki is a distinguished inventor whose work in acrylamide polymers has made a lasting impact on the industry. His innovative patents and collaborations highlight his commitment to advancing polymer chemistry.