logo

For the Inventor, By the Inventor

Chigasaki, Japan

Seitaro Kajiya

This inventor holds 11 USPTO granted patents, plus 1 CIPO patent. Top assignees: Mitsui Toatsu Chemicals, Incorporated, Mitsui Toatsu Kagaki Kabushiki Kaisha, Mitsui Toatsu Kagaku Kabushiki Kaisha. Active years: 1984-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seitaro Kajiya. Retrieved from https://idiyas.com/inventor/seitaro-kajiya

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

USPTO Granted Patents = 11

% Patents Active = 100.0


Average Co-Inventor Count = 7.9

ph-index = 3

Forward Citations = 15(Granted Patents)


Location History:

  • Yokohama, JP (1984 - 1985)
  • Kanagawa, JP (1988)
  • Chigasaki, JP (1991 - 1992)
  • Chiba, JP (1994 - 1996)
  • Chiba-ken, JP (1997)

Company Filing History:

goldMedal8 out of 1,379 
 
Mitsui Toatsu Chemicals, Incorporated
 patents
silverMedal1 out of 1 
 
Mitsui Toatsu Kagaki Kabushiki Kaisha
 patent
bronzeMedal1 out of 7 
 
Mitsui Toatsu Kagaku Kabushiki Kaisha
 patents
4. 1 out of 1 
 
Mitsui Toatsu Kaguku Kabushiki Kaisha
 patent

Years Active: 1984-1997

Loading Chart...
Loading Chart...
11 patents (USPTO):Explore Patents
1. 5602160 - Aminoketone derivatives and use thereof (1997-02-11),
2. 5498619 - Aminoketone derivative and use thereof (1996-03-12),
3. 5338857 - Aminoketone derivatives of 1,2-oxazole and use thereof (1994-08-16),
4. 5089622 - (-)-2-pyrazoline compounds and therapeutic agent for cerebrovascular (1992-02-18),
5. 5075449 - Method of optically resolving (1991-12-24),
6. 4782154 - Isoquinoline derivatives (1988-11-01),
7. 4532137 - 2-Thiazolamine derivatives, process for preparing same, and (1985-07-30),
8. 4524147 - Uracil derivatives, process for preparing same, and pharmaceutical (1985-06-18),
9. 4511574 - N-(4-Phenyl-2-thiazolyl)carbamate derivatives (1985-04-16),
10. 4501750 - Thiazole compounds, a process for preparing same and a pharmaceutical (1985-02-26),
11. 4490393 - Thiazolylurea derivatives, a process for preparing same and a (1984-12-25),

Title: Seitaro Kajiya: Innovator in Aminoketone Derivatives

Introduction

Seitaro Kajiya is a prominent inventor based in Chigasaki, Japan. He has made significant contributions to the field of medicinal chemistry, particularly in the development of aminoketone derivatives. With a total of 11 patents to his name, Kajiya's work has had a substantial impact on the pharmaceutical industry.

Latest Patents

Kajiya's latest patents focus on aminoketone derivative compounds that contain a heterocyclic ring bonded to an aminoketone moiety. These compounds are recognized for their effectiveness as ingredients in centrally acting muscle relaxants and pollakiurea curing agents. One notable patent describes the compound (+)3-phenyl-5-[2-(1-pyrrolidinylmethyl)butyryl]isoxazole, which exhibits a remarkable central muscle relaxant action compared to its racemic modification. This compound can be effectively separated from its racemic form using optically active 10-camphorsulfonic acid as the agent for optical resolution.

Career Highlights

Throughout his career, Kajiya has worked with notable companies such as Mitsui Toatsu Chemicals, Incorporated and Mitsui Toatsu Kagaki Kabushiki Kaisha. His innovative research and development efforts have contributed to advancements in the pharmaceutical sector.

Collaborations

Kajiya has collaborated with esteemed colleagues, including Hiroshi Kawazura and Norio Ohto. These partnerships have further enhanced the scope and impact of his research.

Conclusion

Seitaro Kajiya's contributions to the field of medicinal chemistry, particularly through his patents on aminoketone derivatives, highlight his role as a key innovator. His work continues to influence the development of effective pharmaceutical agents.

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]
Loading…