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Chlorine Engineers Corp., Ltd.

USPTO Granted Patents = 76

% Expired Patents = 11.8

EPO Patents = 10

Forward Citations = 654

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108 inventors (with patents filed for the assignee):

Shinji Katayama (11 out of 16 patents)

Teruo Ichisaka (9 out of 9 patents)

Masaaki Kato (8 out of 26 patents)

4. Kiyohito Asaumi (8 out of 9 patents)

5. Takamichi Kishi (7 out of 11 patents)

6. Osamu Arimoto (6 out of 6 patents)

7. Hiroyuki Harada (6 out of 6 patents)

8. Tadao Ikegami (6 out of 6 patents)

9. Nobutaka Goto (6 out of 6 patents)

10. Nobuo Kobayashi (5 out of 18 patents)

11. Naoya Hayamizu (5 out of 31 patents)

12. Terumi Matsuoka (5 out of 5 patents)

13. Koji Saiki (4 out of 17 patents)

14. Mitsuharu Hamamori (4 out of 5 patents)

15. Hitoshi Satoh (4 out of 4 patents)

Core Competencies:

Electrolytic Cell

Chlorine Production

Gas Diffusion Electrode

Ion Exchange Membrane

Sodium Hydroxide

Sulfuric Acid

Electrolysis

Hypochlorite

Hydrogen Generation

Electrolyzer

Cathode

Anode

76 patents: Sort by Forward Citations

1. 9476130 - Electrolytic cell (2016-10-25),

2. 9315908 - Electrolytic cell for producing chlorine—sodium hydroxide and method of producing chlorine—sodium hydroxide (2016-04-19),

3. 9181624 - Method of electrolysis employing two-chamber ion exchange membrane electrolytic cell having gas diffusion electrode (2015-11-10),

4. 9175410 - Oxygen gas diffusion cathode, electrolytic cell employing same, method of producing chlorine gas and method of producing sodium hydroxide (2015-11-03),

5. 8940139 - Gas diffusion electrode equipped ion exchange membrane electrolyzer (2015-01-27),

6. 8454754 - Cleaning method and method for manufacturing electronic device (2013-06-04),

7. 8277623 - Conductive diamond electrode and ozone generator using the same (2012-10-02),

8. 8236161 - Apparatus for electrolyzing sulfuric acid, method of performing electrolysis, and apparatus for processing a substrate (2012-08-07),

9. 8211287 - Sulfuric acid electrolysis process (2012-07-03),

10. 8197649 - Ion exchange membrane electrolytic cell (2012-06-12),

11. 8187449 - Cleaning method by electrolytic sulfuric acid and manufacturing method of semiconductor device (2012-05-29),

12. 8137513 - Sulfuric acid electrolytic cell and a sulfuric acid recycle type cleaning system applying the sulfuric acid electrolytic cell (2012-03-20),

13. 8034221 - Electrode for hydrogen generation and process for preparation thereof (2011-10-11),

14. 7927471 - Three-dimensional electrode for electrolysis, ion exchange membrane electrolytic cell and method of electrolysis using three-dimensional electrode (2011-04-19),

15. 7922879 - Ion exchange membrane electrolyzer (2011-04-12),

Company Overview

Chlorine Engineers Corp., Ltd., based in Tokyo, specializes in electrolytic cell technology, focusing on the production of chlorine and related chemicals. The company is known for its advancements in gas diffusion electrodes and ion exchange membranes, which are critical components in electrolysis processes. Their technology supports the efficient generation of sodium hydroxide and sulfuric acid, as well as hypochlorite solutions, contributing to various industrial applications and promoting sustainable chemical production methods.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

76 Patents

#643 in Tokyo

#1,347 in Japan

#9,898 in the World

Chlorine Engineers Corp., Ltd.

Forward Citations = 654

108 inventors:

Shinji Katayama (11 out of 16 patents)

Teruo Ichisaka (9 out of 9 patents)

Masaaki Kato (8 out of 26 patents)

4. Kiyohito Asaumi (8 out of 9 patents)

5. Takamichi Kishi (7 out of 11 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Chlorine Engineers Corp., Ltd.. Retrieved from https://idiyas.com/company/chlorine-engineers

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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