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For the Inventor, By the Inventor

Tokyo, Japan

Yoshitaka Kageyama

This inventor holds 9 USPTO granted patents. Top assignee: Mitsubishi Rayon Company, Limited. Active years: 1987-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshitaka Kageyama. Retrieved from https://idiyas.com/inventor/yoshitaka-kageyama

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 4.5

ph-index = 4

Forward Citations = 99(Granted Patents)


Location History:

  • Nagoya, JP (1987)
  • Tokyo, JP (1988 - 1992)
  • Kawasaki, JP (1992)
  • Kawsaki, JP (1996)
  • Hiroshima, JP (2002)

Company Filing History:

goldMedal9 out of 1,357 
 
Mitsubishi Rayon Company, Limited
 patents

Years Active: 1987-2002

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9 patents (USPTO):Explore Patents
1. 6428891 - Acrylonitrile-based precursor fiber for carbon fiber and method for production thereof (2002-08-06),
2. 5480580 - Optically active compound having a .delta.-valerolactone ring and liquid (1996-01-02),
3. 5164113 - Optical active compound and liquid crystal composition (1992-11-17),
4. 5124069 - Optically active substance and liquid crystal composition comprising same (1992-06-23),
5. 5098599 - Optically active compound and liquid crystal composition (1992-03-24),
6. 5045228 - Optically active compound having XI-valerolactone ring and liquid (1991-09-03),
7. 4925591 - Mesomorphic compound having .beta.-hydroxycarboxyl group as chiral (1990-05-15),
8. 4751018 - Alpha-methylcinnamic acid ester derivative and liquid crystal composition (1988-06-14),
9. 4642736 - Light diffuser (1987-02-10),

Title: Innovations of Yoshitaka Kageyama

Introduction

Yoshitaka Kageyama is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced fibers and optical compounds. With a total of nine patents to his name, Kageyama's work has had a substantial impact on various industries.

Latest Patents

One of Kageyama's latest patents is for an acrylonitrile-based precursor fiber for carbon fiber and the method for its production. This invention involves a copolymer containing 96.0 to 98.5% by weight of acrylonitrile units. The precursor fiber is characterized by a tensile strength of not less than 7.0 cN/dtex and an elastic modulus in tension of not less than 130 cN/dtex. It also features an iodine adsorption of not greater than 0.5% by weight and a degree of crystal orientation of not less than 90%. This high-performance fiber can be used to create high-quality carbon fiber efficiently and cost-effectively. Another notable patent is for an optically active compound having a delta-valerolactone ring. This compound is chemically stable, colorless, and provides a liquid crystal composition with large spontaneous polarization when incorporated.

Career Highlights

Kageyama is currently associated with Mitsubishi Rayon Company, Limited, where he continues to innovate and develop new materials. His work has been instrumental in advancing the capabilities of carbon fibers and liquid crystal technologies.

Collaborations

Kageyama has collaborated with notable coworkers such as Jun Nakauchi and Keiichi Sakashita. Their combined expertise has contributed to the successful development of innovative materials and technologies.

Conclusion

Yoshitaka Kageyama's contributions to the field of materials science through his patents and collaborations highlight his role as a leading inventor. His work continues to influence advancements in carbon fiber and optical compounds, showcasing the importance of innovation in technology.

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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