% Expired Patents = 14.3

EPO Patents = 1

Forward Citations = 88

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14 inventors (with patents filed for the assignee):

Gohei Yoshida (5 out of 6 patents)

Kazuhiko Hirao (3 out of 3 patents)

Yukinori Honjo (3 out of 3 patents)

4. Qi Lu (2 out of 2 patents)

5. Masayuki Ito (1 out of 27 patents)

6. Yuuichi Hayashi (1 out of 1 patent)

7. Lu Qi (1 out of 1 patent)

8. Masao Kobayashi (1 out of 2 patents)

9. Nobuyuki Ishida (1 out of 2 patents)

10. Makoto Muramoto (1 out of 1 patent)

11. Fujio Matsushita (1 out of 1 patent)

12. Yuichi Hayashi (1 out of 1 patent)

13. Hirohisa Hikita (1 out of 1 patent)

14. Naoki Matsumoto (1 out of 1 patent)

7 patents: Sort by Forward Citations

1. 12540078 - Molding material for producing carbon clusters and a method for manufacturing thereof (2026-02-03),

2. 8758713 - Method for photooxidation of carbon monoxide in gas phase to carbon dioxide (2014-06-24),

3. 6582854 - Lithium ion secondary battery, cathode active material therefor and production thereof (2003-06-24),

4. 6348182 - Process for producing lithium manganese oxide with spinel structure (2002-02-19),

5. 5985237 - Process for producing lithium manganese oxide suitable for use as (1999-11-16),

6. 5252356 - Method of producing transparent zinc oxide films (1993-10-12),

7. 4282117 - Method for producing electrically conductive zinc oxide (1981-08-04),

Company Overview

The Honjo Chemical Corporation is a leading chemical company specializing in the production of high-quality industrial chemicals. With a strong focus on innovation and sustainability, we strive to provide our customers with cutting-edge solutions for their chemical needs. Our extensive product range includes specialty chemicals, adhesives, and coatings for various industries such as automotive, electronics, and construction. Committed to excellence, Honjo Chemical Corporation is dedicated to meeting the highest standards of quality and customer satisfaction.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

7 Patents

#597 in Osaka

#5,459 in Japan

Osaka, Japan

The Honjo Chemical Corporation

Forward Citations = 88

14 inventors:

Gohei Yoshida (5 out of 6 patents)

Kazuhiko Hirao (3 out of 3 patents)

Yukinori Honjo (3 out of 3 patents)

4. Qi Lu (2 out of 2 patents)

5. Masayuki Ito (1 out of 27 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: The Honjo Chemical Corporation. Retrieved from https://idiyas.com/company/honjo-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]

1 patent (EPO):

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]