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For the Inventor, By the Inventor

Ibaraki, Japan

Yasuo Tezuka

This inventor holds 17 USPTO granted patents, primarily in Reactive Dyes. Top assignee: Sumitomo Chemical Company, Limited. Active years: 1982-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuo Tezuka. Retrieved from https://idiyas.com/inventor/yasuo-tezuka

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

Calculating rank
USPTO Granted Patents = 17

% Patents Active = 100.0

Average Co-Inventor Count = 3.2

ph-index = 7

Forward Citations = 128(Granted Patents)


Location History:

  • Ibaraki, JP (1982 - 1990)
  • Nara, JP (1984 - 1990)

Company Filing History:

goldMedal17 out of 6,967 
 
Sumitomo Chemical Company, Limited
 patents

Years Active: 1982-1990

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Areas of Expertise:
Reactive Dyes
Monochlorotriazinyl
Vinylsulfone
Bisazo Dyes
Fiber Reactive
Phthalocyanine
Azo Dyes
Sulphonic Compounds
Polysaccharides
Aminonaphthol
Dye Processes
17 patents (USPTO):Explore Patents
1. 4937326 - Reactive scarlet dyes having both monochlorotriazinyl and vinylsulfone (1990-06-26),
2. 4935500 - Metallized formazan compounds having two fiber reactive groups linked by (1990-06-19),
3. 4841031 - Reactive dye having both monochlorotriazinyl and vinylsulfone type (1989-06-20),
4. 4841027 - Process for preparing phenyl- and naphthylazo-aminonaphthol sulphonic (1989-06-20),
5. 4720542 - Formazan blue reactive dye (1988-01-19),
6. 4667022 - Reactive dye having both monochlorotriozinyl and vinylsulfone type (1987-05-19),
7. 4663440 - Bisazo brown reactive dye (1987-05-05),
8. 4644058 - Reactive pyridone azo dyes having both monochlorotriazinyl and (1987-02-17),
9. 4530996 - Bisazo blue-black dye having vinylsulfone type fiber-reactive group (1985-07-23),
10. 4490525 - Polysaccharides containing phthalocyanine nucleus (1984-12-25),
11. 4482501 - Process for producing aminoaryl-.beta.-sulfatoethylsulfone (1984-11-13),
12. 4464297 - Fiber reactive bisazo dye having both a vinylsulfone type reactive group (1984-08-07),
13. 4412948 - Reactive disazo blue dye (1983-11-01),
14. 4396549 - Copper phthalocyanine blue reactive dye (1983-08-02),
15. 4378313 - Reactive yellow dye having both monochlorotriazinyl and vinylsulfone (1983-03-29),

Title: Yasuo Tezuka: Innovator in Reactive Dyes

Introduction

Yasuo Tezuka is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of dye chemistry, particularly in the development of reactive dyes. With a total of 17 patents to his name, Tezuka's work has had a lasting impact on the textile industry.

Latest Patents

Tezuka's latest patents include innovative formulations for reactive scarlet dyes. One notable invention is a novel reactive monoazo dye that provides cellulose fiber materials with a deep orange to scarlet color. This dye exhibits superior build-up properties and chlorine fastness. Another significant patent involves metallized formazan compounds that have two fiber reactive groups. These compounds are designed for dyeing hydroxy- or amido-containing fiber materials, resulting in a deep blue color with excellent fastness against light and perspiration.

Career Highlights

Yasuo Tezuka is currently associated with Sumitomo Chemical Company, Limited, where he continues to advance the field of dye technology. His expertise in reactive dyes has positioned him as a key figure in the industry, contributing to the development of high-performance dye products.

Collaborations

Tezuka has collaborated with notable colleagues such as Takashi Omura and Masaki Sunami. These partnerships have fostered innovation and have led to the successful development of various dye formulations.

Conclusion

Yasuo Tezuka's contributions to the field of dye chemistry are noteworthy, with his innovative patents paving the way for advancements in textile coloration. His work continues to influence the industry, showcasing the importance of innovation in chemical engineering.

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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