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For the Inventor, By the Inventor

Ehime, Japan

Kiyomi Sakai

This inventor holds 9 USPTO granted patents. Top assignee: Sumitomo Chemical Company, Limited. Active years: 1986-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyomi Sakai. Retrieved from https://idiyas.com/inventor/kiyomi-sakai

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 = 3.3

ph-index = 3

Forward Citations = 16(Granted Patents)


Location History:

  • Niihama, JP (1987 - 1989)
  • Ehime, JP (1986 - 1994)

Company Filing History:

goldMedal9 out of 6,961 
 
Sumitomo Chemical Company, Limited
 patents

Years Active: 1986-1994

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9 patents (USPTO):Explore Patents
1. 5300662 - Process for producing coumarin and derivatives thereof (1994-04-05),
2. 5260457 - Process for producing coumarin and derivative thereof (1993-11-09),
3. 5237075 - Process for producing 3,4-dihydrocoumarin derivatives (1993-08-17),
4. 5231194 - Process for producing coumarin derivatives (1993-07-27),
5. 5218129 - Process for producing 3,4-dihydrocoumarin (1993-06-08),
6. 4879422 - Method for producing cycloalkanol (1989-11-07),
7. 4716253 - Method for producing cycloalkanols (1987-12-29),
8. 4670612 - Method for producing alicyclic alcohols (1987-06-02),
9. 4568769 - Method for producing a mixture containing cycloalkanones and (1986-02-04),

Title: Kiyomi Sakai: Innovator in Coumarin Production

Introduction

Kiyomi Sakai is a notable inventor based in Ehime, Japan. She has made significant contributions to the field of chemistry, particularly in the production of coumarin and its derivatives. With a total of 9 patents to her name, Sakai's work has had a considerable impact on the industry.

Latest Patents

Sakai's latest patents include innovative processes for producing coumarin and its derivatives. One of her notable inventions is a process that involves the dehydrogenation of 3,4-dihydrocoumarin or a derivative thereof in the presence of a palladium catalyst by heating under reduced pressure. Another significant patent details a method for producing coumarin represented by a specific formula, which involves heating a 3-(2-cyclohexanoyl) propionic acid ester in the presence of a palladium catalyst to facilitate cyclization and dehydrogenation reactions.

Career Highlights

Kiyomi Sakai is currently employed at Sumitomo Chemical Company, Limited, where she continues to advance her research and development efforts. Her work has been instrumental in enhancing the efficiency and effectiveness of coumarin production processes.

Collaborations

Sakai has collaborated with esteemed colleagues such as Tamio Shirafuji and Kensen Okusako. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Kiyomi Sakai's contributions to the field of chemistry, particularly in coumarin production, highlight her role as a leading inventor. Her innovative processes and collaborations continue to shape the industry and inspire future advancements.

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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