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For the Inventor, By the Inventor

Kanagawa, Japan

Chiyoda Corporation

Calculating rank
USPTO Granted Patents = 176

% Expired Patents = 11.4



Trademarks = 9

Forward Citations = 1,198

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372 inventors (with patents filed for the assignee):

goldMedal Sachio Asaoka (20 out of 27 patents)

silverMedal Takeshi Minami (17 out of 18 patents)

bronzeMedal 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

176 patents:

1. 12783757 - Fluid leakage detection system, fluid leakage detection device, and learning device (2026-11-03),
2. 12746536 - Composite catalyst, method for producing composite catalyst, and method for producing lower olefins (2026-09-29),
3. 12617739 - Method for producing para-xylene (2026-05-05),
4. 12578065 - Management system and management method, and computer-readable storage medium (2026-03-17),
5. 12577689 - Cathode electrode, composite of cathode electrode and substrate, and method of manufacturing composite of cathode electrode and substrate (2026-03-17),
6. 12573653 - Electrochemical cell, power generation method using electrochemical cell, and manufacturing method of hydrogen gas using electrochemical cell (2026-03-10),
7. 12569834 - Uniform-type platinum-loaded alumina catalyst, method of producing same, and method of using same (2026-03-10),
8. 12540125 - Method for producing ethylene oxide (2026-02-03),
9. 12517920 - Information processing device, data structure, information processing program, and information processing method (2026-01-06),
10. 12468295 - Assistance method, assistance device, and assistance program (2025-11-11),
11. 12449794 - Production system (2025-10-21),
12. 12436508 - Assistance device, learning device, and plant operation condition setting assistance system (2025-10-07),
13. 12384735 - Manufacturing method of butadiene (2025-08-12),
14. 12282720 - Fluid state estimation system, learning device, learning program, estimation device, and estimation program (2025-04-21),
15. 12253306 - Method and system for determining operating conditions of liquefied natural gas plant (2025-03-18),
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.

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USPTO Data Jan 1 1976 - Nov 10 2026

Chiyoda Corporation USPTO Patent Assignee Logo
176 Patents

#23 in Kanagawa

#773 in Japan

#4,731 in the World

Kanagawa, JP
Kanagawa, Japan

Chiyoda Corporation

Forward Citations = 1,198

372 inventors:

goldMedal Sachio Asaoka (20 out of 27 patents)

silverMedal Takeshi Minami (17 out of 18 patents)

bronzeMedal 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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