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For the Inventor, By the Inventor

Tokyo, Japan

Hirohito Kawama

This inventor holds 9 USPTO granted patents and 3 published patent applications. Top assignee: Kureha Corporation. Active years: 2009-2019.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hirohito Kawama. Retrieved from https://idiyas.com/inventor/hirohito-kawama

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

USPTO Granted Patents = 9 

% Patents Active = 33.3

Average Co-Inventor Count = 3.5

ph-index = 7

Forward Citations = 132(Granted Patents)


Location History:

  • Fukushima, JP (2009 - 2010)
  • Tokyo, JP (2010 - 2019)

Company Filing History:

goldMedal9 out of 336 
 
Kureha Corporation
 patents

Years Active: 2009-2019

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9 patents (USPTO):Explore Patents
1. 10196486 - Polyarylene sulfide production method and polyarylene sulfide produced using production method (2019-02-05),
2. 9908974 - Polyarylene sulfide production method and polyarylene sulfide production apparatus (2018-03-06),
3. 8183336 - Poly (arylene sulfide) (2012-05-22),
4. 8076447 - Poly (arylene sulfide) and production process thereof (2011-12-13),
5. 7834133 - Production process of poly(arylene sulfide) (2010-11-16),
6. 7767783 - Poly (arylene sulfide) and production process thereof (2010-08-03),
7. 7754848 - Poly (arylene sulfide) and production process thereof (2010-07-13),
8. 7655748 - Poly(arylene sulfide) and production process thereof (2010-02-02),
9. 7504476 - Poly(arylene sulfide) and production process thereof (2009-03-17),

Title: Hirohito Kawama: Innovator in Polyarylene Sulfide Production

Introduction

Hirohito Kawama is a prominent inventor based in Tokyo, Japan, renowned for his contributions to the field of polymer production, particularly in polyarylene sulfide. With a remarkable portfolio of nine patents, he continues to innovate techniques that enhance the efficiency and environmental sustainability of chemical processes.

Latest Patents

His latest inventions focus primarily on advancing the production methods of polyarylene sulfide (PAS). One notable patent details a method for producing PAS wherein an unreacted dihalo aromatic compound is effectively recovered and reused. The process includes several critical steps:

- A polymerization step;

- A separation step;

- A recovery step, utilizing steam distillation to recover the unreacted dihalo aromatic compound from a water-containing mixture.

Additionally, Kawama's production apparatus ensures high-quality polymer production while significantly reducing environmental impact by preventing the leakage of floating polymers during the washing process.

Career Highlights

Kawama's career is marked by significant advancements in polymer production methodologies at Kureha Corporation, where he has been instrumental in developing innovative solutions that address both quality and environmental concerns. His expertise has positioned him as a key figure in research and development within the organization.

Collaborations

Throughout his career, Hirohito Kawama has collaborated with notable colleagues, including Hiroyuki Sato and Koichi Suzuki. Their teamwork has fostered an environment of innovation, leading to substantial improvements in polymer production techniques and applications.

Conclusion

Hirohito Kawama's work exemplifies the spirit of innovation within the chemical engineering field. His dedication to advancing production methods in polyarylene sulfide not only showcases his expertise but also reflects a growing commitment to sustainable practices in manufacturing. Through his patents and collaborations, he continues to influence the future of polymer chemistry 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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