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For the Inventor, By the Inventor

Ichihara, Japan

Kazutoshi Ishikawa

This inventor holds 5 USPTO granted patents. Top assignee: Idemitsu Petrochemical Co., Ltd.. Active years: 1991-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazutoshi Ishikawa. Retrieved from https://idiyas.com/inventor/kazutoshi-ishikawa-zfastpc8

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 3.3

ph-index = 4

Forward Citations = 29(Granted Patents)


Company Filing History:

goldMedal5 out of 555 
 
Idemitsu Petrochemical Co., Ltd.
 patents

Years Active: 1991-1997

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5 patents (USPTO):Explore Patents
1. 5597879 - Process for producing styrenic polymer (1997-01-28),
2. 5306790 - Process for producing styrenic polymer (1994-04-26),
3. 5254647 - Process for producing styrene-based polymers (1993-10-19),
4. 5037907 - Process for producing mainly syndiotactic styrene-based polymers (1991-08-06),
5. 5032650 - Process for producing a highly syndiotactic styrene-based polymer (1991-07-16),

Title: Kazutoshi Ishikawa: Innovator in Styrenic Polymer Production

Introduction

Kazutoshi Ishikawa is a prominent inventor based in Ichihara, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of styrenic polymers. With a total of 5 patents to his name, Ishikawa's work has had a substantial impact on industrial processes.

Latest Patents

Ishikawa's latest patents focus on innovative processes for producing styrenic polymers. One notable patent describes a method for continuously producing a highly syndiotactic styrenic polymer using a horizontal self-cleaning type reactor. This process involves feeding a catalyst or both the catalyst and a styrenic monomer in at least two portions, which enhances temperature control within the reactor and significantly boosts productivity. Another patent outlines a process for efficiently producing a styrenic polymer with a high degree of syndiotactic configuration. This method utilizes a polymerization reactor maintained under reduced pressure, where the temperature is controlled by vaporizing part of the introduced styrenic monomer. This approach addresses challenges such as reactor scale-up and polymer adhesion, thereby increasing the industrial significance of the process.

Career Highlights

Kazutoshi Ishikawa is currently employed at Idemitsu Petrochemical Co., Ltd., where he continues to advance his research and development efforts in polymer production. His innovative approaches have positioned him as a key figure in the industry.

Collaborations

Ishikawa has collaborated with notable colleagues, including Hideki Imabayashi and Koji Yamamoto. Their combined expertise has contributed to the success of various projects and patents in the field of polymer chemistry.

Conclusion

Kazutoshi Ishikawa's contributions to the production of styrenic polymers demonstrate his innovative spirit and commitment to advancing industrial processes. His patents reflect a deep understanding of polymer chemistry and its applications, making him a valuable asset to the field.

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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