Tokyo, Japan

Hiroyuki Mitsui

This inventor holds 22 USPTO granted patents and 2 published patent applications, plus 9 CIPO patents and 13 EPO patents, primarily in Hydrometallurgical Processes. Top assignees: Sumitomo Metal Mining Company, Ltd., Mitsubishi Heavy Industries Limited, Mitsubishi Power, Ltd.. Active years: 2014-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroyuki Mitsui. Retrieved from https://idiyas.com/inventor/hiroyuki-mitsui

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 22 

% Patents Active = 18.2

 

 

Average Co-Inventor Count = 3.7

ph-index = 1

Forward Citations = 7(Granted Patents)


Location History:

  • Minato-ku, JP (2016 - 2019)
  • Tokyo, JP (2014 - 2024)

Company Filing History:


Years Active: 2014-2025

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Areas of Expertise:
Steam Turbine
Blade Cleaning
Corrosion Sensor
Thermal Barrier Coating
Hematite Production
Water Treatment
Nickel Sulfide
Hydrometallurgical Method
Dezincification
Wastewater Treatment
Ore Slurry
Metal Refining
22 patents (USPTO):Explore Patents

Title: **Innovative Mind: The Patents and Contributions of Hiroyuki Mitsui**

Introduction

Hiroyuki Mitsui, a notable inventor based in Tokyo, Japan, has made significant contributions to the field of engineering and technology. With an impressive portfolio of 22 patents, he has demonstrated a relentless pursuit of innovation, particularly in steam turbine technologies and cleaning methods for rotary devices.

Latest Patents

Among Mitsui’s latest patents are two remarkable inventions. The first is a steam turbine that includes a shaft rotating around its axis, equipped with moving blades extending radially and organized circumferentially. This turbine design features a casing to shield the shaft and blades, alongside stationary blades positioned on the casing's inner surface. A unique aspect of this invention is the substance supply unit that delivers a hydrophobic film-forming substance to the blades, enhancing both performance and reliability.

The second patent focuses on an innovative method for cleaning the blades of rotary devices. This method encompasses several steps, starting with the application of a water-soluble cleaning liquid that contains a surfactant. Following application, the blade is set aside, wiped clean, and subjected to a second application of either water or a diluted cleaning solution, ensuring thorough cleanliness and maintenance of the device.

Career Highlights

Hiroyuki Mitsui’s career has seen him contribute his expertise to some esteemed companies, including Sumitomo Metal Mining Company, Ltd. and Mitsubishi Heavy Industries Limited. His work in these organizations has allowed him to collaborate on various projects that leverage his inventive skills and technical knowledge.

Collaborations

Throughout his career, Mitsui has had the opportunity to work alongside talented individuals such as Osamu Nakai and Satoshi Matsubara. These collaborations have likely provided a fertile ground for exchanging ideas and enhancing innovation, reinforcing the significance of teamwork in the field of technology.

Conclusion

Hiroyuki Mitsui is a distinguished inventor whose work in the engineering sector continues to impact the industry through his inventive solutions. With a strong emphasis on improving existing technologies, his patents reflect a commitment to enhancing performance and reliability in various devices. As he progresses in his career, it will be interesting to see what future innovations he brings to life.

Profile summary based on public USPTO records.
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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