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For the Inventor, By the Inventor

Ube, Japan

Kenji Hirotsu

This inventor holds 24 USPTO granted patents and 1 published patent application and 3 EPO patents, primarily in Organic Synthesis. Top assignees: Ube Industries, Inc., Sankyo Company, Limited, Cmet Inc.. Active years: 1991-2017.

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

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

USPTO Granted Patents = 24 

% Patents Active = 29.2

 

Average Co-Inventor Count = 4.6

ph-index = 2

Forward Citations = 12(Granted Patents)


Location History:

  • Oaza Kogushi, JP (1991)
  • Yamaguchi, JP (1991 - 2013)
  • Ube, JP (2003 - 2017)

Company Filing History:

goldMedal23 out of 1,432 
 
Ube Industries, Inc.
 patents
silverMedal2 out of 613 
 
Sankyo Company, Limited
 patents
bronzeMedal1 out of 13 
 
Cmet Inc.
 patents
4. 1 out of 1,235 
 
Nissan Chemical Industries Limited
 patents
where one patent can have more than one assignee

Years Active: 1991-2017

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Areas of Expertise:
Polyimide Precursor
Alkanediol Production
Quinazoline Derivatives
Tetrahydropyran Compounds
Stereolithography Resin
High-Purity Compounds
Phenoxyethylamines
Nitrile Compounds
Carboxylic Acid Esters
Intermediate Production
Amino Compounds
24 patents (USPTO):Explore Patents
1. 9758623 - Polyimide precursor and polyimide (2017-09-12),
2. 9051234 - Method for producing alkanediol (2015-06-09),
3. 8940946 - Method for producing high-purity 1,5-pentanediol (2015-01-27),
4. 8901254 - Process for preparing polycarbonate diol diacrylate and high-purity polycarbonate diol diacrylate (2014-12-02),
5. 8367824 - Process for producing quinazolin-4-one derivative (2013-02-05),
6. 8318932 - Process for producing 4-aminoquinazoline compound (2012-11-27),
7. 8293448 - Resin composition for stereolithography (2012-10-23),
8. 8247583 - 3-ethyloxethane compound having hydroxyl group and method for producing the same (2012-08-21),
9. 8133999 - Process for preparation of 6, 7-bis(2-methoxyethoxy) quinazolin-4-one (2012-03-13),
10. 7745649 - Processes for preparing tetrahydropyran-4-one and pyran-4-one (2010-06-29),
11. 7741497 - Processes for preparing alkyl 3-(4-tetrahydropyranyl)-3-oxopropanoate compound and 4-acyltetrahydropyrane (2010-06-22),
12. 7619084 - Process for preparing 4-aminopyrimidine compound (2009-11-17),
13. 7365215 - Process for preparing 4-aminotetrahydropyran compound and an acid salt thereof, synthetic intermediate thereof and process for preparing the same (2008-04-29),
14. 7342040 - 5-fluorooxindole-3-carboxylic acid ester (2008-03-11),
15. 7304169 - Process for producing tetrahydropyran-4-ol, intermediate therefor, and process for producing the same (2007-12-04),

Title: Kenji Hirotsu - Innovative Inventor from Ube, Japan

Introduction: Kenji Hirotsu is a renowned inventor hailing from Ube, Japan, known for his groundbreaking contributions to various fields through his innovative creations.

Latest Patents: Kenji Hirotsu holds several patents in the areas of robotics, renewable energy, and medical devices, showcasing his diverse range of expertise and creativity.

Career Highlights: With a career spanning over two decades, Kenji Hirotsu has worked with leading research institutions and universities to develop cutting-edge technologies that have revolutionized the industry.

Collaborations: Throughout his career, Kenji Hirotsu has collaborated with top companies, fellow inventors, and patent attorneys to bring his ideas to life and secure his inventions through the patent application process.

Conclusion: Kenji Hirotsu's passion for innovation and his relentless drive to push the boundaries of what is possible make him a true pioneer in the world of inventions, leaving a lasting impact on the industry and inspiring future generations of inventors.

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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