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For the Inventor, By the Inventor

Osaka, Japan

Katayama Chemical, Inc.


USPTO Granted Patents = 20

% Expired Patents = 10.0


Forward Citations = 156

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40 inventors (with patents filed for the assignee):

goldMedal Yoshiharu Wakao (4 out of 4 patents)

silverMedal Sakae Katayama (4 out of 20 patents)

bronzeMedal Yosuke Ito (4 out of 7 patents)

4.  Hidenori Hirashima (4 out of 4 patents)

5.  Sakae Katayama, Deceased (4 out of 4 patents)

6.  Katsuji Tsuji (3 out of 3 patents)

7.  Yasuo Fukuyo (2 out of 2 patents)

8.  Takuro Tabuchi (2 out of 2 patents)

9.  Takashi Mizumori (2 out of 2 patents)

10.  Kunio Nishimura (2 out of 4 patents)

11.  Yoichi Sano (2 out of 2 patents)

12.  Yoshinori Nishiki (1 out of 86 patents)

13.  Takahito Ikeshita (1 out of 1 patent)

14.  Yuji Fuchino (1 out of 1 patent)

15.  Hideaki Shimomoto (1 out of 1 patent)


20 patents:

1. 9546452 - Process for manufacturing paperboard (2017-01-17),
2. 8123958 - Method for treating ship ballast water (2012-02-28),
3. 7618545 - Method for treating ship ballast water (2009-11-17),
4. 6461649 - Improving quality of flour-baked compositions (2002-10-08),
5. 6106770 - Method for preventing obstruction in aluminum brass pipes in a water (2000-08-22),
6. 6045684 - Process and apparatus for the production of an aqueous solution of (2000-04-04),
7. 5912389 - Stabilizer and stabilizing method for aqueous aliphatic aldehyde solution (1999-06-15),
8. 5760091 - Preventive agents against adhesion of marine organisms and methods of (1998-06-02),
9. 5591759 - Aqueous isothiazolone formulation (1997-01-07),
10. 5416248 - Method of removing volatile chlorinated hydrocarbon base materials (1995-05-16),
11. 5411990 - Industrial microbicide and a method for killing microbes for industrial (1995-05-02),
12. 5397804 - Industrial microbicide and a method for killing microbes for industrial (1995-03-14),
13. 5366661 - Method for forming a stabilized aqueous dispersion of inorganic (1994-11-22),
14. 5306725 - Stabilized isothiazolone liquid formulation (1994-04-26),
15. 5259985 - Calcium carbonate scale inhibitor having organophosphonate, water (1993-11-09),
Company Overview
Katayama Chemical, Inc. is a prominent player in the chemical industry, specializing in the development and manufacturing of a diverse range of chemical products. The company focuses on innovative solutions for various applications, including materials for electronics, automotive components, and industrial processes. With a strong commitment to research and development, Katayama Chemical aims to advance technology in the chemical sector, contributing to sustainable practices and enhancing product performance across multiple industries.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

20 Patents

#321 in Osaka

#2,945 in Japan

#31,295 in the World

Osaka, JP
Osaka, Japan

Katayama Chemical, Inc.

Forward Citations = 156

40 inventors:

goldMedal Yoshiharu Wakao (4 out of 4 patents)

silverMedal Sakae Katayama (4 out of 20 patents)

bronzeMedal Yosuke Ito (4 out of 7 patents)

4.  Hidenori Hirashima (4 out of 4 patents)

5.  Sakae Katayama, Deceased (4 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Katayama Chemical, Inc.. Retrieved from https://idiyas.com/company/katayama-chemical

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

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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