Osaka, Japan

Toshifumi Ishitobi

This inventor holds 2 USPTO granted patents. Top assignee: Koa Oil Company, Limited. Active years: 1984-1988.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Toshifumi Ishitobi. Retrieved from https://idiyas.com/inventor/toshifumi-ishitobi

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


% Patents Active = 100.0

Average Co-Inventor Count = 6.0

ph-index = 1

Forward Citations = 9(Granted Patents)


Company Filing History:


Years Active: 1984-1988

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2 patents (USPTO):Explore Patents

Title: Innovator Toshifumi Ishitobi: Pioneering Carbonaceous Material Production

Introduction

Toshifumi Ishitobi is a prominent inventor based in Osaka, Japan, known for his innovative contributions in the field of carbonaceous material production. With two patents to his name, Ishitobi has made significant advancements that have implications for various industrial applications.

Latest Patents

Ishitobi's most recent patents revolve around the production of crystallizable carbonaceous materials. The first patent describes an apparatus and method for this production process. Heavy oils, including atmospheric pressure residues and reduced pressure residues from petroleum, are subjected to heating at temperatures ranging from 400 to 500 degrees Celsius to facilitate polycondensation. This process generates a pitch containing mesophase microspheres. After the pitch is cooled to between 200 and 400 degrees Celsius, a turbulent flow is introduced, promoting the agglomeration of these microspheres. The final step involves separating the resulting agglomerates to yield a crystallizable material enriched with quinoline insolubles. The production is preferably conducted within a separation tank that accommodates the lower section of a heating polycondensation reactor, equipped with a stirring device.

The second patent mirrors the first in terms of the intricate process involved in generating crystallizable carbonaceous materials, emphasizing the same crucial steps of heating, cooling, turbulent flow introduction, and agglomerate separation.

Career Highlights

Toshifumi Ishitobi is currently associated with Koa Oil Company, Limited, where he utilizes his expertise to further research and develop practical applications for his inventions. His work has earned him recognition within the scientific community and the industry.

Collaborations

Ishitobi has collaborated with skilled professionals in his field, including Kosaku Noguchi and Honami Tanaka. These partnerships have enhanced the development and refinement of his patented technologies.

Conclusion

Toshifumi Ishitobi stands out as an innovative inventor whose work in producing crystallizable carbonaceous materials continues to influence the industry. His patents reflect a deep understanding of material science and engineering processes, paving the way for future advancements in this area.

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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