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For the Inventor, By the Inventor

Ibaraki, Japan

Shunichi Koyanagi

This inventor holds 10 USPTO granted patents. Top assignee: Shin-Etsu Chemical Co., Ltd.. Active years: 1976-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shunichi Koyanagi. Retrieved from https://idiyas.com/inventor/shunichi-koyanagi

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

USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 3.8

ph-index = 6

Forward Citations = 99(Granted Patents)


Location History:

  • Yokohama, JA (1976)
  • Joetsu, JP (1978)
  • Joetsu, JA (1978)
  • Naoetsu, JP (1979)
  • Ibaragi, JP (1979 - 1980)
  • Kanagawa, JP (1985)
  • Yokohama, JP (1988)

Company Filing History:

goldMedal10 out of 5,989 
 
Shin-Etsu Chemical Co., Ltd.
 patents

Years Active: 1976-1988

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10 patents (USPTO):Explore Patents
1. 4758639 - Process for production of vinyl polymer (1988-07-19),
2. 4757124 - Process for production of vinyl chloride polymer (1988-07-12),
3. 4528336 - Method for preventing polymer scale deposition in polymerization of (1985-07-09),
4. 4232141 - Method for the preparation of vinyl chloride polymers (1980-11-04),
5. 4180634 - Polymerizing vinyl chloride with lowering of scale formation (1979-12-25),
6. 4173696 - Method for the polymerization of vinyl monomers (1979-11-06),
7. 4136242 - Method for suspension-polymerizing vinyl chloride (1979-01-23),
8. 4105839 - Method for polymerizing ethylenically unsaturated monomers in order to (1978-08-08),
9. 4090015 - Method for polymerizing dienic monomers (1978-05-16),
10. 3945958 - Method for suspension-polymerizing vinyl chloride (1976-03-23),

Title: Shunichi Koyanagi: Innovator in Vinyl Polymer Production

Introduction

Shunichi Koyanagi is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of polymer chemistry, particularly in the production of vinyl polymers. With a total of 10 patents to his name, Koyanagi's work has had a substantial impact on the industry.

Latest Patents

Koyanagi's latest patents include innovative processes for the production of vinyl polymers. One notable patent is a process for the production of a vinyl polymer by suspension polymerization or emulsion polymerization of at least one kind of vinyl monomer in an aqueous medium. This process effectively prevents scaling on the inner wall surface of a polymerizer during polymerization. Another significant patent focuses on the production of a vinyl chloride polymer, which also utilizes a similar approach to prevent scaling while controlling chloride ion concentration in the reaction mixture.

Career Highlights

Koyanagi is currently associated with Shin-Etsu Chemical Co., Ltd., where he continues to advance his research and development efforts. His expertise in polymerization processes has positioned him as a key figure in the field.

Collaborations

Throughout his career, Koyanagi has collaborated with notable colleagues, including Toshihide Shimizu and Ichiro Kaneko. These collaborations have further enriched his research and contributed to the success of his innovative projects.

Conclusion

Shunichi Koyanagi's contributions to the field of vinyl polymer production exemplify his dedication to innovation and excellence. His patents reflect a commitment to improving industrial processes and advancing 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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