Shizuoka, Japan

Kenji Hijikata

This inventor holds 61 USPTO granted patents, primarily in Polyester Resin Technology (CPC class 5281). Top assignees: Polyplastics Co., Ltd., Celanese Gmbh, Hoechst Celanese Corporation. Active years: 1986-1998.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kenji Hijikata. Retrieved from https://idiyas.com/inventor/kenji-hijikata

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


% Patents Active = 100.0

Average Co-Inventor Count = 3.2

ph-index = 13

Forward Citations = 460(Granted Patents)

Forward Citations (Not Self Cited) = 447(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Fuji, JP (1986 - 1988)
  • Mishima, JP (1988 - 1993)
  • Shizuoka, JP (1990 - 1998)

Company Filing History:


Years Active: 1986-1998

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Areas of Expertise:
Polyester Resin
Copolymers
Melt-Stable Resins
Blow-Molding
Flame-Retardant
Thermoplastic
Injection-Molding
Transparent Films
Heat-Resistant
Liquid-Crystalline
Reinforced Composites
Anisotropic Properties
61 patents (USPTO):Explore Patents

Title: **Kenji Hijikata: Innovator in Polymer Technology**

Introduction

Kenji Hijikata, based in Shizuoka, Japan, is a renowned inventor with an impressive portfolio of 61 patents. His work primarily revolves around advanced polymer technologies, showcasing his commitment to innovation in materials science. His latest patents exemplify his focus on creating high-performance materials for various applications.

Latest Patents

Among Kenji Hijikata's most notable inventions is the “Fibrillar Copolyester Having a Large Aspect Ratio.” This patent details a production method for a fibrillar copolyester, notable for its excellent heat resistance, reinforcing effect, and high dimensional stability. The invention allows for the polymerization of specific hydroxy aromatic carboxylic acid monomers in a nonpolar solvent with 10 or more carbon atoms, resulting in a specific fibrillar copolyester with an aspect ratio of at least 3.0.

Another significant patent relates to his “Reinforced Composite Resin Material and Method for its Production.” This direct method involves the polymerization of a copolyester with high heat resistance and a reinforcing effect within a molten preformed thermoplastic polymer. The resulting fibrillar copolyester is generated under shearing stress, which facilitates the formation of fibrous reinforcement within the preformed polymer.

Career Highlights

Kenji Hijikata has made substantial contributions to polymer technology through his tenure in leading companies such as Polyplastics Co., Ltd. and Celanese GmbH. His expertise has brought innovative solutions to the field, particularly in the development of advanced composite materials.

Collaborations

Throughout his career, Kenji has collaborated with esteemed colleagues like Toshio Nakane and Yukihiko Kageyama. These collaborations have played a vital role in enhancing his research and have contributed to his impactful innovations in polymer science.

Conclusion

Kenji Hijikata's contributions to polymer technology through his extensive patent portfolio and collaborations underscore his position as a leading innovator. His work continues to influence the development of high-performance materials that meet demanding technical specifications in various industries.

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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