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For the Inventor, By the Inventor

Kyoto, Japan

Isao Tomioka

This inventor holds 10 USPTO granted patents. Top assignees: Unitika Ltd., Rikagaku Kenkyusho, Other. Active years: 1985-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Isao Tomioka. Retrieved from https://idiyas.com/inventor/isao-tomioka

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 = 4.7

ph-index = 6

Forward Citations = 87(Granted Patents)


Company Filing History:

goldMedal10 out of 394 
 
Unitika Ltd.
 patents
silverMedal1 out of 126 
 
Rikagaku Kenkyusho
 patents
bronzeMedal2 out of 834,513 
Other
 patents
where one patent can have more than one assignee

Years Active: 1985-2001

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10 patents (USPTO):Explore Patents
1. 6294049 - Polyimide precursor fibrid, polyimide paper, polyimide composite paper and polyimide composite board obtained therefrom, and process for producing the fibrid and the paper products (2001-09-25),
2. 5719253 - Poly(amic acid) solution and polyimide film or polymide-coated material (1998-02-17),
3. 5510395 - Film forming solution, porous film obtained therefrom and coated (1996-04-23),
4. 5466732 - Polyimide precursor solution, process for producing the solution and (1995-11-14),
5. 5463016 - Granular material of polyimide precursor, mixture comprising the (1995-10-31),
6. 5294546 - Method for production of a growth factor for Bifidobacterium sp. (1994-03-15),
7. 5001055 - Process for producing physiologically active substance (1991-03-19),
8. 4886749 - Process for producing diadenosine tetraphosphate and derivatives thereof (1989-12-12),
9. 4572894 - Process for synthesizing peptides or peptide derivatives (1986-02-25),
10. 4554253 - Apparatus for synthesizing adenosine-5'-triphosphate (1985-11-19),

Title: Isao Tomioka: Innovator in Polyimide Technology

Introduction

Isao Tomioka is a prominent inventor based in Kyoto, Japan, known for his significant contributions to the field of polyimide technology. With a total of 10 patents to his name, he has made remarkable advancements in materials that exhibit exceptional strength and thermal stability.

Latest Patents

Tomioka's latest patents include innovations such as a polyimide precursor fibrid, polyimide paper, polyimide composite paper, and polyimide composite board. His work on the polyimide precursor fibrid material focuses on creating a polyimide that does not undergo thermal melting during a ring closure reaction and is free from aprotic polar organic solvents. This innovation allows for the production of polyimide paper products with excellent strength. Additionally, he has developed a poly(amic acid) solution that avoids the use of aprotic polar solvents, resulting in a polyimide film with appropriate flexibility and a low coefficient of linear thermal expansion.

Career Highlights

Throughout his career, Isao Tomioka has worked with notable companies, including Unitika Ltd. His expertise in polyimide materials has positioned him as a key figure in the development of advanced materials for various applications.

Collaborations

Tomioka has collaborated with esteemed colleagues such as Yoshiaki Echigo and Hiroshi Nakajima, contributing to the advancement of polyimide technology through shared knowledge and innovation.

Conclusion

Isao Tomioka's contributions to polyimide technology have significantly impacted the materials science field. His innovative patents and collaborations highlight his dedication to advancing material properties and applications.

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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