Ichihara, Japan

Norio Tomotsu

This inventor holds 38 USPTO granted patents and 4 published patent applications, plus 2 CIPO patents, primarily in Styrene Polymerization. Top assignees: Idemitsu Kosan Company, Limited, Idemitsu Petrochemical Co., Ltd.. Active years: 1990-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Norio Tomotsu. Retrieved from https://idiyas.com/inventor/norio-tomotsu

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

USPTO Granted Patents = 38 

% Patents Active = 94.7

 

Average Co-Inventor Count = 2.2

ph-index = 7

Forward Citations = 162(Granted Patents)


Location History:

  • Ichihara, JP (1990 - 2004)
  • Chiba, JP (2004)

Company Filing History:


Years Active: 1990-2004

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Areas of Expertise:
Catalysts
Polymerization
Styrene
Polymer Composition
Adsorbents
Organic Aluminoxy
Vinyl-Based Polymers
Molecular Weight Control
Aromatic Vinyl Compounds
Syndiotactic Configuration
Homogeneous Aluminoxane
Ethylene Polymers
38 patents (USPTO):Explore Patents

Title: **Norio Tomotsu: A Pioneer in Styrene Polymer Innovations**

Introduction

Norio Tomotsu, an accomplished inventor based in Ichihara, Japan, has made significant contributions to the field of polymer chemistry. With a remarkable total of 38 patents, he has been instrumental in advancing the technologies surrounding styrene and its polymers. His innovative work continues to influence various applications, particularly in the development of effective adsorbents.

Latest Patents

Among Norio Tomotsu's latest achievements are patents focused on catalysts for polymerizing styrene and other monomers, highlighting his ongoing dedication to the field. Additionally, he has developed a novel adsorbent composed of styrene polymers, which is created by dissolving a substantially syndiotactic styrene polymer in an organic compound that has an affinity for the polymer. This process is followed by shaping the resulting mixture and removing the organic compound from the shaped product. Furthermore, the adsorbent provides a method for producing the polymer solution by melting it into the desired shape. The innovative design of this adsorbent allows for selective and efficient adsorption of organic compounds in both gaseous and liquid environments.

Career Highlights

Norio Tomotsu has held critical positions in notable companies, including Idemitsu Kosan Company, Limited and Idemitsu Petrochemical Co., Ltd. His extensive career in these organizations has enabled him to work on groundbreaking projects and push the boundaries of polymer technology. Tomotsu's inventions have established him as a key figure in the realm of industrial applications for styrene-based materials.

Collaborations

Throughout his career, Norio Tomotsu has collaborated with renowned colleagues, such as Mizutomo Takeuchi and Hiroshi Maezawa. Together, they have shared expertise and insights that have driven further advancements in polymer chemistry and have contributed to a broader understanding of styrene polymers and their capabilities.

Conclusion

Norio Tomotsu's persistent quest for innovation has not only led to numerous patents but also has provided significant advancements in the production and application of styrene polymers. His work continues to inspire future generations of inventors and researchers in the fields of material science and chemistry. As he adds to his impressive portfolio, Tomotsu remains a pivotal figure in the ongoing evolution of polymer technologies.

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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