Hisatsugu Kaji

This inventor holds 21 USPTO granted patents, primarily in Fuel Cell Technology. Top assignees: Kureha Kagaku Kogyo Kabushiki Kaisha, Jureha Kagaku Kogyo Kabushiki Kaisha, Kureha Chemical Industry Company, Limited. Active years: 1981-1990.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hisatsugu Kaji. Retrieved from https://idiyas.com/inventor/hisatsugu-kaji

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

Calculating rank

USPTO Granted Patents = 21

% Patents Active = 100.0

Average Co-Inventor Count = 3.4

ph-index = 10

Forward Citations = 228(Granted Patents)

Company Filing History:

19 out of 776

Kureha Kagaku Kogyo Kabushiki Kaisha

patents

1 out of 1

Jureha Kagaku Kogyo Kabushiki Kaisha

patent

1 out of 128

Kureha Chemical Industry Company, Limited

where one patent can have more than one assignee

Years Active: 1981-1990

Loading Chart...

Areas of Expertise:

Fuel Cell

Electrode Substrate

Carbonaceous Materials

Composite Product

Flexible Graphite

Porous Carbon Fibers

Spherical Particles

Magnetic Abrasive Powder

Multilayer Design

Activated Carbon

Peripheral Sealers

Intercooler

21 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 4956131 - Fuel cell electrode substrate incorporating separator as an intercooler (1990-09-11),

2. 4855092 - Process for preparing a carbonaceous fuel cell electrode substrate (1989-08-08),

3. 4818640 - Carbonaceous composite product produced by joining carbonaceous (1989-04-04),

4. 4794043 - Carbon product comprising carbonaceous materials joined together, said (1988-12-27),

5. 4778736 - Electrode substrate provided with manifold, for a fuel cell and process (1988-10-18),

6. 4743519 - Fuel cell electrode substrate provided with peripheral sealers (1988-05-10),

7. 4730418 - Abrasing apparatus using magnetic abrasive powder (1988-03-15),

8. 4729910 - Reinforced flexible graphite sheet (1988-03-08),

9. 4686072 - Process for preparing a carbonaceous five-layer fuel cell electrode (1987-08-11),

10. 4664988 - Fuel cell electrode substrate incorporating separator as an intercooler (1987-05-12),

11. 4580337 - Process for producing electrode substrate for fuel cells (1986-04-08),

12. 4579789 - Carbonaceous fuel cell electrode substrate incorporating three-layer (1986-04-01),

13. 4567086 - Carbonaceous, five-layer fuel cell electrode substrate with elongated (1986-01-28),

14. 4522895 - Multilayer fuel cell electrode substrate having elongated holes for (1985-06-11),

15. 4506028 - Process for preparing a fuel cell electrode substrate comprising carbon (1985-03-19),

Title: Hisatsugu Kaji: A Pioneer in Fuel Cell Technology

Introduction

Hisatsugu Kaji is a prominent inventor based in Iwaki, Japan, known for his significant contributions to fuel cell technology. With an impressive portfolio of 21 patents, Kaji has developed innovative solutions that enhance the efficiency and performance of fuel cells, specifically through advanced substrate designs.

Latest Patents

Among Hisatsugu Kaji's latest contributions is the invention of a fuel cell electrode substrate that incorporates a separator functioning as an intercooler. This invention details an electrode substrate made up of two porous, carbonaceous layers, each featuring elongated holes strategically positioned to allow the feeding of reactant gases. These layers are complemented by a gas impermeable, carbonaceous separator interposed between them, which also includes elongated holes for coolant flow. The unique design of the porous layers, which can either be a monolayer or a two-layer structure, provides exceptional properties such as mechanical strength and enhanced thermal and electric resistances. Kaji has also patented processes for the preparation of such innovative electrode substrates for fuel cells, solidifying his position at the forefront of fuel cell technology.

Career Highlights

Kaji's career includes notable roles in well-respected companies, where he has applied his expertise in materials for fuel cells. He has been associated with Kureha Kagaku Kogyo Kabushiki Kaisha and Jureha Kagaku Kogyo Kabushiki Kaisha. His experiences at these organizations have significantly contributed to his innovative capabilities and have provided him with a rich background in research and development.

Collaborations

Throughout his career, Hisatsugu Kaji has collaborated with esteemed colleagues such as Kuniyuki Saitoh and Hiroyuki Fukuda. These partnerships have enabled him to enhance his research endeavors and push the boundaries of what is possible in fuel cell technology.

Conclusion

Hisatsugu Kaji's inventive spirit and dedication to advancing fuel cell technology continue to inspire innovation in the energy sector. With a strong focus on improving the performance and efficiency of fuel cells through his patented inventions, Kaji remains an influential figure in the field, paving the way for future advancements and sustainability in energy solutions.

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]