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For the Inventor, By the Inventor

Iwaki, Japan

Toshitaka Kouyama

This inventor holds 28 USPTO granted patents, plus 1 CIPO patent, primarily in Polymer Chemistry. Top assignees: Kureha Kagaku Kogyo K.k., Kureha Kagaku Kogyo Kabushiki Kaisha. Active years: 1986-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshitaka Kouyama. Retrieved from https://idiyas.com/inventor/toshitaka-kouyama

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

USPTO Granted Patents = 28

% Patents Active = 100.0


Average Co-Inventor Count = 4.8

ph-index = 13

Forward Citations = 417(Granted Patents)


Location History:

  • Fukushima, JP (1989 - 2001)
  • Iwaki, JP (1986 - 2004)

Company Filing History:

goldMedal17 out of 137 
 
Kureha Kagaku Kogyo K.k.
 patents
silverMedal11 out of 776 
 
Kureha Kagaku Kogyo Kabushiki Kaisha
 patents

Years Active: 1986-2004

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Areas of Expertise:
Gas-Barrier
Polyglycolic Acid
Polyarylene Thioether
Injection-Molded
Stretch Blow Molded
Sealing Resin Compositions
High-Quality Fibers
Melt-Processing
Transparent Films
Thermal Stability
Corrosion Prevention
Block Copolymers
28 patents (USPTO):Explore Patents
1. 6673403 - Gas-barrier, multi-layer hollow container (2004-01-06),
2. 6245437 - Gas-barrier composite film (2001-06-12),
3. 6183679 - Production process for injection-molded product of polyglycolic acid (2001-02-06),
4. 6159416 - Stretch blow molded container and production process thereof (2000-12-12),
5. 6046251 - Injection-molded product of polyglycolic acid and production process (2000-04-04),
6. 6001439 - Stretch blow molded container and production process thereof (1999-12-14),
7. 5908917 - Polyglycolic acid sheet and production process thereof (1999-06-01),
8. 5853639 - Oriented polyglycolic acid film and production process thereof (1998-12-29),
9. 5474828 - Electronic device sealing resin compositions and sealed electronic (1995-12-12),
10. 5332770 - Electronic device sealing resin compositions and sealed electronic (1994-07-26),
11. 5006591 - Polyarylene thioether composition and molded product thereof (1991-04-09),
12. 4921758 - Molded product of polyarylene thioether and the use thereof (1990-05-01),
13. 4897238 - Stretched poly(arylene thioether-ketone) films and production process (1990-01-30),
14. 4895924 - Poly(arylene thioether-ketone) fibers and production process thereof (1990-01-23),
15. 4895912 - Stretched poly(arylene thioether-ketone) films and production process (1990-01-23),

Title: Innovations and Contributions of Toshitaka Kouyama

Introduction

Toshitaka Kouyama, based in Iwaki, Japan, is a prolific inventor with an impressive portfolio of 28 patents. His contributions to the field of materials science and packaging technology have significantly advanced the understanding and utilization of gas-barrier technologies, among other innovations.

Latest Patents

Among his latest innovations are patents related to gas-barrier multi-layer hollow containers and composite films. One notable patent is for a gas-barrier composite film, which features a layer structure consisting of a thermoplastic resin film laminated onto at least one side of a film formed from polyglycolic acid. This composite film contains at least 60 weight percent of a specific repeating unit. These advancements are crucial for enhancing the durability and effectiveness of packaging solutions.

Career Highlights

Throughout his career, Kouyama has made significant strides in the field while working for Kureha Kagaku Kogyo K.K. and Kureha Kagaku Kogyo Kabushiki Kaisha. His work has not only earned him numerous patents but has also positioned him as a key figure in the innovation of gas-barrier materials.

Collaborations

Toshitaka Kouyama has collaborated with esteemed colleagues such as Zenya Shiiki and Yo Iizuka. Together, they have contributed to various projects that emphasize the importance of research and development in their respective fields, further enhancing their collaborative impact on the industry.

Conclusion

In summary, Toshitaka Kouyama's 28 patents reflect his dedication to innovation and improvement in packaging technologies. His ongoing work and collaborations lay a strong foundation for future advancements, making him a significant contributor to the field of materials science.

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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