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For the Inventor, By the Inventor

Ohmuta, Japan

Zunzi Tashima

This inventor holds 3 USPTO granted patents. Top assignee: Mitsui Toatsu Chemicals, Incorporated. Active years: 1991-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Zunzi Tashima. Retrieved from https://idiyas.com/inventor/zunzi-tashima

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

USPTO Granted Patents = 3

% Patents Active = 100.0

Average Co-Inventor Count = 6.2

ph-index = 3

Forward Citations = 34(Granted Patents)


Location History:

  • Ohmuta, JP (1991 - 1993)
  • Omuta, JP (1994)

Company Filing History:

goldMedal3 out of 1,379 
 
Mitsui Toatsu Chemicals, Incorporated
 patents

Years Active: 1991-1994

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3 patents (USPTO):Explore Patents
1. 5364958 - Process for the production of methylene-crosslinked polyphenylene (1994-11-15),
2. 5179227 - Fractionation process of reaction mixture containing methylene bridged (1993-01-12),
3. 5053539 - Methylene-crosslinked polyarylamine and process for preparing same (1991-10-01),

Title: Zunzi Tashima: Innovator in Polyphenylene Chemistry

Introduction

Zunzi Tashima is a notable inventor based in Ohmuta, Japan. He has made significant contributions to the field of polyphenylene chemistry, holding a total of 3 patents. His work focuses on improving the production processes of methylene-crosslinked polyphenylene compounds.

Latest Patents

Tashima's latest patents include a process for the production of methylene-crosslinked polyphenylene polyisocyanate. This innovative method enhances the hue of the polyisocyanate produced by reacting phosgene with a polyamine mixture derived from aniline and formaldehyde. The process involves removing residual phosgene and applying heat treatment in the presence of hydrogen chloride gas. Another significant patent is a fractionation process for a reaction mixture containing methylene bridged polyphenylene polyisocyanate. This process separates the mixture into fractions, focusing on the content of specific isomers while minimizing impurities.

Career Highlights

Zunzi Tashima is currently employed at Mitsui Toatsu Chemicals, Incorporated, where he continues to advance his research and development efforts. His work has been instrumental in enhancing the applications of polyphenylene compounds in various industries.

Collaborations

Tashima has collaborated with esteemed colleagues such as Noritoshi Ishida and Takashi Nagou. Their combined expertise has contributed to the successful development of innovative chemical processes.

Conclusion

Zunzi Tashima's contributions to polyphenylene chemistry exemplify the impact of innovative thinking in the field. His patents reflect a commitment to improving production processes and enhancing the quality of chemical products.

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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