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For the Inventor, By the Inventor

Hirakata, Japan

Shigenao Kawakami

This inventor holds 8 USPTO granted patents. Top assignee: Sumitomo Chemical Company, Limited. Active years: 1978-1999.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shigenao Kawakami. Retrieved from https://idiyas.com/inventor/shigenao-kawakami

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

USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 4.5

ph-index = 5

Forward Citations = 150(Granted Patents)


Location History:

  • Hirakata, JA (1978)
  • Hirakata, JP (1979 - 1980)
  • Osaka, JP (1981)
  • Nara, JP (1984)
  • Ilkoma-gun, JP (1999)

Company Filing History:

goldMedal8 out of 6,961 
 
Sumitomo Chemical Company, Limited
 patents

Years Active: 1978-1999

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8 patents (USPTO):Explore Patents
1. 5865951 - Process for making paper (1999-02-02),
2. 4464505 - Coating composition for providing water and blister resistant, (1984-08-07),
3. 4444943 - Coating compositions for providing water and blister resistance to (1984-04-24),
4. 4251651 - Amphoteric polyelectrolyte (1981-02-17),
5. 4221888 - Method of hydrolyzing acrylamide and methacrylamide polymers (1980-09-09),
6. 4164413 - Method for promoting growth of plants with cationic polymers (1979-08-14),
7. 4138446 - Water-soluble high polymers and their preparation (1979-02-06),
8. 4075183 - Preparation of water-soluble high polymers (1978-02-21),

Title: Shigenao Kawakami: Innovator in Papermaking Technology

Introduction

Shigenao Kawakami is a notable inventor based in Hirakata, Japan. He has made significant contributions to the field of papermaking, holding a total of 8 patents. His work focuses on improving the quality and efficiency of paper production processes.

Latest Patents

Kawakami's latest patents include a process for making paper, which involves forming a sheet in the presence of a neutral sizing agent and optionally a filler. This innovative method utilizes a cationic polymer as a paper quality improver, which is prepared by copolymerizing an acrylamide compound. Another significant patent is a coating composition designed to provide water and blister resistance. This composition contains a pigment and an aqueous binder as major components, along with a mixture of reaction products that enhance the durability of the paper.

Career Highlights

Shigenao Kawakami is currently associated with Sumitomo Chemical Company, Limited, where he continues to develop innovative solutions in the papermaking industry. His expertise and dedication have positioned him as a key figure in advancing paper technology.

Collaborations

Kawakami has collaborated with several talented individuals in his field, including Shin-ichi Isaoka and Tatsumi Shibata. These partnerships have fostered a collaborative environment that encourages innovation and the sharing of ideas.

Conclusion

Shigenao Kawakami's contributions to papermaking technology through his patents and collaborations highlight his role as an influential inventor. His work continues to impact the industry positively, paving the way for future advancements in paper production.

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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