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For the Inventor, By the Inventor

Tokyo, Japan

Lead Chemical Company, Limited


USPTO Granted Patents = 18

% Expired Patents = 16.7



Trademarks = 1

Forward Citations = 75

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36 inventors (with patents filed for the assignee):

goldMedal Masao Mori (8 out of 10 patents)

silverMedal Haruo Saito (5 out of 5 patents)

bronzeMedal Seijiro Yama (4 out of 5 patents)

4.  Tamaki Horiuchi (4 out of 4 patents)

5.  Hideo Nemoto (3 out of 3 patents)

6.  Takayasu Matsuzawa (3 out of 3 patents)

7.  Atsushi Nishida (2 out of 6 patents)

8.  Naoki Murai (2 out of 3 patents)

9.  Masao Hattori (2 out of 11 patents)

10.  Sunao Takeuchi (2 out of 2 patents)

11.  Masako Nakagawa (2 out of 2 patents)

12.  Eiichi Yoshii (2 out of 2 patents)

13.  Yuji Matsuya (1 out of 1 patent)

14.  Kenji Toda (1 out of 9 patents)

15.  Tadashi Ishigaki (1 out of 2 patents)


18 patents:

1. 11491116 - Adhesive patch (2022-11-08),
2. 8841284 - Compound having neurite-outgrowing activity (2014-09-23),
3. 8734680 - Silicate-based phosphor and manufacturing method of silicate-based phosphor (2014-05-27),
4. 8568770 - Adhesive material containing 5-methyl-1-phenyl-2-(1H)-pyridone (2013-10-29),
5. 8551979 - Nonaqueous preparation for percutaneous absorption containing nonsteroidal anti-inflammatory analgesic (2013-10-08),
6. 8287900 - Medicated patch comprising 5-methyl-1-phenyl-2-(1H)-pyridone (2012-10-16),
7. 8252273 - Ultraviolet absorber (2012-08-28),
8. 8076368 - Percutaneous absorption type cerebral protective agent (2011-12-13),
9. 7662852 - Compounds and preparations having antiviral effect (2010-02-16),
10. 7361785 - Compound protecting against ultraviolet rays (2008-04-22),
11. 7265229 - Method for synthesizing macrosphelides (2007-09-04),
12. 7164054 - Liner for patch (2007-01-16),
13. 6358984 - 2,4-dioxopyrrolidine and 2,4-dioxotetrahydrofuran derivatives and medicines containing the same as the active ingredient (2002-03-19),
14. 6348484 - Stereoisomeric indole compounds, process for the preparation of the same, and use thereof (2002-02-19),
15. 6268395 - Phorbol derivatives having antivirus activity (2001-07-31),
Company Overview
Lead Chemical Company, Limited, based in Tokyo, specializes in the development and manufacturing of advanced chemical products. The company focuses on various sectors, including industrial chemicals, specialty materials, and innovative solutions tailored to meet the evolving needs of its clients. With a commitment to research and development, Lead Chemical aims to enhance product performance and sustainability, contributing to diverse industries both domestically and internationally.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 20 2026

18 Patents

#1,414 in Tokyo

#3,124 in Japan

#34,244 in the World

Tokyo, JP
Tokyo, Japan

Lead Chemical Company, Limited

Forward Citations = 75

36 inventors:

goldMedal Masao Mori (8 out of 10 patents)

silverMedal Haruo Saito (5 out of 5 patents)

bronzeMedal Seijiro Yama (4 out of 5 patents)

4.  Tamaki Horiuchi (4 out of 4 patents)

5.  Hideo Nemoto (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Lead Chemical Company, Limited. Retrieved from https://idiyas.com/company/lead-chemical-company

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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