logo

For the Inventor, By the Inventor

Kanagawa, Japan

Hidenori Kumobayashi

This inventor holds 69 USPTO granted patents, primarily in Optically Active Compounds (CPC class 556 ). Top assignees: Takasago International Corporation, Takasago Perfumery Co., Ltd., Daiichi Pharmaceutical Co., Ltd.. Active years: 1979-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hidenori Kumobayashi. Retrieved from https://idiyas.com/inventor/hidenori-kumobayashi

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

Calculating rank
USPTO Granted Patents = 69

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 13

Forward Citations = 491(Granted Patents)

Forward Citations (Not Self Cited) = 414(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Chigasaki, JP (1979 - 1993)
  • Tokyo, JP (1990 - 1997)
  • Hiratsuka, JP (1994 - 1998)
  • Kanagawa, JP (1985 - 2001)

Company Filing History:

goldMedal59 out of 512 
 
Takasago International Corporation
 patents
silverMedal10 out of 47 
 
Takasago Perfumery Co., Ltd.
 patents
bronzeMedal1 out of 200 
 
Daiichi Pharmaceutical Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1979-2001

Loading Chart...
Areas of Expertise:
Optically Active
Phosphine Complex
Chiral Diphosphine
Transition Metal
Acyloxylation
Diaminohexanone
Azetidinone Derivatives
Carnitine Ester
Carboxylic Acid
Butyrolactone
Hydroxyketones
Tertiary Phosphine
69 patents (USPTO):Explore Patents
1. 6197996 - Process for preparing optically active carnitine ester (2001-03-06),
2. 5859249 - 2-phenyl-2-(2'-piperidinylidene)acetate derivative, process for (1999-01-12),
3. 5847222 - Optically active diphosphine compound, method for making the compound, (1998-12-08),
4. 5837877 - Process for preparing optically active 4-hydroxy-2-pyrrolidone (1998-11-17),
5. 5824822 - Phospphine-phosinite compound and process for preparing (1998-10-20),
6. 5808162 - Chiral unsymmetric diphosphine compound and transition metal complex (1998-09-15),
7. 5801271 - 7-(n-substituted amino)-2-phenylheptanoic acid derivative and process (1998-09-01),
8. 5756760 - 1-substituted-2-diphenylphosphinonaphthalene and transition metal (1998-05-26),
9. 5686616 - Process for preparing an optically active amine (1997-11-11),
10. 5631397 - Process for producing optically active diaminohexanone derivative (1997-05-20),
11. 5629420 - Substituted acetoxyazetidinone derivatives and process for preparing (1997-05-13),
12. 5606052 - Substituted acetoxyazetidinone derivatives and process for preparing (1997-02-25),
13. 5599954 - N-substituted-7-amino-5-hydroxy-3-oxoheptanoic acid derivatives and (1997-02-04),
14. 5581007 - Process for preparing optically active allophenylnorstatin derivatives (1996-12-03),
15. 5563295 - Process for producing optically active carboxylic acid (1996-10-08),

Title: Hidenori Kumobayashi: Innovator in Optically Active Compounds

Introduction

Hidenori Kumobayashi, located in Kanagawa, Japan, is a prolific inventor with a remarkable portfolio of 69 patents. His innovative contributions primarily focus on the field of organic chemistry, particularly in the synthesis of optically active compounds that have significant pharmaceutical applications.

Latest Patents

Among his latest innovations is the "Process for preparing optically active carnitine ester." This process involves the preparation of a 2-phenyl-2-(2'-piperidinylidene)acetate derivative, which serves as a key raw material in the synthesis of antidepressant drugs. This groundbreaking work discloses a method for manufacturing optically active 2-phenyl-2-(2'-piperidinyl)acetate derivatives through an asymmetric hydrogenation process. These advancements highlight his commitment to enhancing drug development through innovative synthetic methods.

Career Highlights

Throughout his career, Hidenori Kumobayashi has worked with prominent companies such as Takasago International Corporation and Takasago Perfumery Co., Ltd. His experiences in these organizations have not only honed his skills in organic chemistry but also facilitated his extensive research and development efforts resulting in numerous patents.

Collaborations

Kumobayashi's journey in the field of innovation has led him to collaborate with distinguished colleagues like Noboru Sayo and Susumu Akutagawa. These partnerships have proven essential in broadening the scope and impact of his research endeavors within the compound synthesis sector.

Conclusion

Hidenori Kumobayashi's contributions to the field of optically active compounds illustrate the importance of innovative thinking in pharmaceutical sciences. His extensive patent portfolio and collaborative efforts underline his influence and commitment to advancing medicinal chemistry, ensuring that his work continues to empower the development of essential therapeutic 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…