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For the Inventor, By the Inventor

Wakayama, Japan

Yasuo Ishii

This inventor holds 11 USPTO granted patents. Top assignees: Kao Corporation, Meito Sangyo Co., Ltd.. Active years: 1991-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yasuo Ishii. Retrieved from https://idiyas.com/inventor/yasuo-ishii-ddefd0tn

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

USPTO Granted Patents = 11

% Patents Active = 100.0

Average Co-Inventor Count = 3.8

ph-index = 6

Forward Citations = 105(Granted Patents)


Company Filing History:

goldMedal11 out of 3,675 
 
Kao Corporation
 patents
silverMedal1 out of 6 
 
Meito Sangyo Co., Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1991-2006

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11 patents (USPTO):Explore Patents
1. 7098250 - Surfactant for emulsion polymerization (2006-08-29),
2. 6599392 - Paper bulking promoter (2003-07-29),
3. 6380302 - Surfactant composition for emulsion polymerization (2002-04-30),
4. 6140297 - Ethoxylate and propoxylated higher alcohol surfactant in high (2000-10-31),
5. 6140296 - Ethoxylate and propoxylated higher alcohol surfactant in high (2000-10-31),
6. 6048831 - Surfactant composition (2000-04-11),
7. 5340521 - Melt viscosity depressant for polyester resin and polyester resin (1994-08-23),
8. 5178950 - Process for producing cationic dye-dyeable polyester fiber with high (1993-01-12),
9. 5162091 - Polyester fibers and process of making (1992-11-10),
10. 5153000 - Phosphate, liposome comprising the phosphate as membrane constituent, (1992-10-06),
11. 5061525 - Sizing method (1991-10-29),

Title: Yasuo Ishii: An Innovator in Polymer Chemistry

Introduction

Yasuo Ishii, hailing from Wakayama, Japan, is a prolific inventor with a remarkable portfolio of 11 patents. His inventions primarily focus on the fields of polymer chemistry and materials science, contributing significantly to advancements in these areas.

Latest Patents

One of Ishii's notable inventions is a surfactant for emulsion polymerization. This invention outlines a surfactant capable of facilitating polymer emulsion production, characterized by specific chemical formulas involving alkylene and oxyethylene groups. Another significant patent is his development of a paper bulking promoter, which enables the production of bulky sheets without compromising the effectiveness of sizing agents. This innovation utilizes ester compounds of polyhydric alcohols and fatty acids, showcasing his expertise in material formulation.

Career Highlights

Ishii has had an esteemed career, collaborating with prominent companies such as Kao Corporation and Meito Sangyo Co., Ltd. His work in these organizations has allowed him to push the boundaries of polymer application in everyday materials.

Collaborations

In his endeavors, Yasuo Ishii has worked alongside talented individuals like Atsuhito Mori and Hiroki Sawada. These collaborations have enriched his research and innovation process, leading to groundbreaking developments in polymer chemistry.

Conclusion

Yasuo Ishii stands out as a significant figure in the field of innovations in polymer science. His contributions through various patents and collaborations have demonstrated his commitment to advancing technology and materials, leaving a lasting impact in the industry.

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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