% Expired Patents = 100.0

EPO Patents = 1

Forward Citations = 2

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2 inventors (with patents filed for the assignee):

Takashi Sawaguchi (3 out of 9 patents)

Daisuke Sasaki (1 out of 5 patents)

3 patents: Sort by Forward Citations

1. 8461265 - Triblock copolymer having biodegradable polymer blocks and method of producing the same (2013-06-11),

2. 7452939 - Polyesterified block copolymer and process for producing the same (2008-11-18),

3. 7125834 - Functional substances derived from oligoolefins having functional groups at the ends (2006-10-24),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

3 Patents

#145 in Saitama 343-0827

#8,932 in Japan

Saitama, Japan

San-Ei Kougyou Corporation

Forward Citations = 2

2 inventors:

Takashi Sawaguchi (3 out of 9 patents)

Daisuke Sasaki (1 out of 5 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: San-Ei Kougyou Corporation. Retrieved from https://idiyas.com/company/san-ei-kougyou

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

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]

1 patent (EPO):

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]