Narashino, Japan

Masahiro Kakugo

This inventor holds 30 USPTO granted patents, plus 2 CIPO patents, primarily in Polymer Chemistry. Top assignee: Sumitomo Chemical Company, Limited. Active years: 1980-1995.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masahiro Kakugo. Retrieved from https://idiyas.com/inventor/masahiro-kakugo

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile


% Patents Active = 100.0

 

Average Co-Inventor Count = 4.2

ph-index = 10

Forward Citations = 240(Granted Patents)


Location History:

  • Niihama, JP (1980 - 1983)
  • Ehime, JP (1981 - 1984)
  • Chiba, JP (1985 - 1992)
  • Narashino, JP (1988 - 1995)

Company Filing History:


Years Active: 1980-1995

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Areas of Expertise:
Cis-1,4-Polybutadiene
Trans-1,4-Polybutadiene
Olefin Polymerization
Thermoplastic Resin
Crystalline Polypropylene
Alpha-Olefin Block Copolymer
High-Strength Polypropylene Fiber
Polypropylene Film
Multilayer Polypropylene Film
Polypropylene Sheet
Propylene Copolymer
Fluidized Bed Apparatus
30 patents (USPTO):Explore Patents

Title: Masahiro Kakugo: A Pioneer in Selective Production of Polybutadiene Patents

Introduction:

Masahiro Kakugo, based in Narashino, Japan, is a renowned inventor and researcher specializing in the field of selective production of polybutadiene. With an impressive track record of 30 patents to his name, Kakugo has made significant contributions to the development of catalysts used in the production of 1,4-polybutadiene. This article explores his latest patents, highlights his career achievements, and sheds light on his notable collaborations in the industry.

Latest Patents:

Kakugo's recent patents include two groundbreaking innovations in the selective production of polybutadiene: the process for selective production of cis-1,4-polybutadiene and the process for selective production of trans-1,4-polybutadiene. Both patents involve novel catalyst compositions and synthetic routes that offer improved control and selectivity in the production of 1,4-polybutadiene, a valuable polymer used in various industrial applications.

The first patent focuses on a catalyst comprised of transition metal compounds, organoaluminum compounds, and organic compounds with hydroxyl groups, providing a highly efficient and selective method for manufacturing cis-1,4-polybutadiene. The second patent employs a similar catalyst system but is specifically designed for the production of trans-1,4-polybutadiene. Kakugo's inventive approach showcases his expertise in designing advanced catalysts for specific polymer products.

Career Highlights:

Masahiro Kakugo is an esteemed employee of Sumitomo Chemical Company, Limited. Sumitomo Chemical, a leading global chemical company based in Japan, is recognized for its extensive research and development efforts in polymer science and applications. Kakugo's affiliation with Sumitomo Chemical reflects his dedication to innovation and collaboration within a highly respected and dynamic organization.

Collaborations:

Kakugo's innovative work in the field of selective polybutadiene production has not been accomplished in isolation. He has collaborated with a number of colleagues, including Akinobu Shiga and Seiichiro Ima. These collaborative efforts have not only contributed to the development of novel catalyst systems but have also fostered a culture of knowledge exchange and shared expertise within the industry.

Conclusion:

Masahiro Kakugo's profound impact on the field of selective polybutadiene production is evident through his extensive patent portfolio. His latest patents for the selective production of cis-1,4-polybutadiene and trans-1,4-polybutadiene demonstrate his commitment to advancing polymer science through innovative catalyst designs. As a key contributor to Sumitomo Chemical's research endeavors, Kakugo exemplifies the dedication and collaborative spirit required to drive meaningful innovation in the field of polymer chemistry.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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