Chiba, Japan

Hiromu Kumagai

This inventor holds 6 USPTO granted patents and 2 published patent applications and 2 EPO patents. Top assignee: Idemitsu Kosan Company, Limited. Active years: 2020-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiromu Kumagai. Retrieved from https://idiyas.com/inventor/hiromu-kumagai

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

USPTO Granted Patents = 6 

% Patents Active = 100.0

 

Average Co-Inventor Count = 2.7

ph-index = 1


Location History:

  • Sodegaura, JP (2020)
  • Chiba, JP (2020 - 2023)

Company Filing History:


Years Active: 2020-2025

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6 patents (USPTO):Explore Patents

Title: Hiromu Kumagai: Innovator in Aromatic Polyether Production

Introduction

Hiromu Kumagai is a notable inventor based in Chiba, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of aromatic polyethers. With a total of 6 patents to his name, Kumagai continues to push the boundaries of innovation in his industry.

Latest Patents

Kumagai's latest patents include a method for producing aromatic polyether and potassium carbonate used in the same process. This method involves reacting 4,4'-dichlorobenzophenone and hydroquinone in the presence of potassium carbonate that meets specific conditions regarding bulk density and particle diameter. Another significant patent is for polyether ether ketone, which features a crystallization temperature of 255° C. or more, with strict limits on fluorine and chlorine atom content.

Career Highlights

Kumagai is currently employed at Idemitsu Kosan Company, Limited, where he applies his expertise in polymer production. His work has been instrumental in developing new materials that meet the evolving demands of various industries.

Collaborations

Kumagai has collaborated with notable colleagues such as Koichi Suga and Minoru Senga. Their combined efforts have led to advancements in the field and have fostered a collaborative environment that encourages innovation.

Conclusion

Hiromu Kumagai's contributions to the field of polymer chemistry, particularly in aromatic polyether production, highlight his role as a leading inventor. His innovative methods and collaborative spirit continue to influence the industry positively.

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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