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Kanagawa, Japan

Chiyoda Corporation

USPTO Granted Patents = 175

% Expired Patents = 11.4

CIPO Patents = 8

EPO Patents = 54

Trademarks = 9

Forward Citations = 1,187

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370 inventors (with patents filed for the assignee):

Sachio Asaoka (20 out of 27 patents)

Takeshi Minami (17 out of 18 patents)

Fuyuki Yagi (15 out of 15 patents)

4. Mitsunori Shimura (13 out of 13 patents)

5. Yoshimi Shiroto (13 out of 24 patents)

6. Shuhei Wakamatsu (12 out of 12 patents)

7. Atsuro Nagumo (12 out of 12 patents)

8. Kenichi Kawazuishi (11 out of 14 patents)

9. Noriyuki Yoneda (11 out of 14 patents)

10. Dai Takeda (10 out of 10 patents)

11. Yoshimi Okada (10 out of 10 patents)

12. Shinichiro Yanagawa (9 out of 30 patents)

13. Nobuo Moriya (9 out of 9 patents)

14. Yoichi Umehara (8 out of 8 patents)

15. Kenichi Imagawa (8 out of 8 patents)

Core Competencies:

Hydrogen Production

Catalyst Design

Gas Treatment

Chemical Manufacturing

Electrochemical Cells

Desulfurization

Olefins Production

Aromatic Hydrocarbons

Plant Management

Synthesis Gas

Natural Gas Liquefaction

Exhaust Gas Treatment

175 patents: Sort by Forward Citations

1. 12746536 - Composite catalyst, method for producing composite catalyst, and method for producing lower olefins (2026-09-29),

2. 12617739 - Method for producing para-xylene (2026-05-05),

3. 12578065 - Management system and management method, and computer-readable storage medium (2026-03-17),

4. 12577689 - Cathode electrode, composite of cathode electrode and substrate, and method of manufacturing composite of cathode electrode and substrate (2026-03-17),

5. 12573653 - Electrochemical cell, power generation method using electrochemical cell, and manufacturing method of hydrogen gas using electrochemical cell (2026-03-10),

6. 12569834 - Uniform-type platinum-loaded alumina catalyst, method of producing same, and method of using same (2026-03-10),

7. 12540125 - Method for producing ethylene oxide (2026-02-03),

8. 12517920 - Information processing device, data structure, information processing program, and information processing method (2026-01-06),

9. 12468295 - Assistance method, assistance device, and assistance program (2025-11-11),

10. 12449794 - Production system (2025-10-21),

11. 12436508 - Assistance device, learning device, and plant operation condition setting assistance system (2025-10-07),

12. 12384735 - Manufacturing method of butadiene (2025-08-12),

13. 12282720 - Fluid state estimation system, learning device, learning program, estimation device, and estimation program (2025-04-21),

14. 12253306 - Method and system for determining operating conditions of liquefied natural gas plant (2025-03-18),

15. 12034280 - Plant module, plant including the same, and operation method of plant (2024-07-09),

Company Overview

Chiyoda Corporation, headquartered in Kanagawa, Japan, specializes in advanced chemical processing technologies. The company is recognized for its expertise in hydrogen production, catalyst design, and gas treatment, contributing significantly to the chemical manufacturing sector. Chiyoda's innovative solutions extend to electrochemical cells, desulfurization processes, and the production of olefins and aromatic hydrocarbons, positioning it as a key player in the development of sustainable energy and chemical solutions.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

175 Patents

#23 in Kanagawa

#774 in Japan

#4,754 in the World

Kanagawa, Japan

Chiyoda Corporation

Forward Citations = 1,187

370 inventors:

Sachio Asaoka (20 out of 27 patents)

Takeshi Minami (17 out of 18 patents)

Fuyuki Yagi (15 out of 15 patents)

4. Mitsunori Shimura (13 out of 13 patents)

5. Yoshimi Shiroto (13 out of 24 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Chiyoda Corporation. Retrieved from https://idiyas.com/company/chiyoda

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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