% Expired Patents = 33.3

CIPO Patents = 1

EPO Patents = 1

Forward Citations = 0

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2 inventors (with patents filed for the assignee):

Yongfeng Wang (3 out of 10 patents)

Kejun Zhao (3 out of 3 patents)

Kejun No 32 Zhujiang Road Zhao (0 patent)

4. Yongfeng C35 Third Floor No 7 Wang (0 patent)

3 patents: Sort by Forward Citations

1. 8461165 - 2-Substituted phenyl-5,7-dihydrocarbyl-3,7-dihydropyrrolo[2,3-d] pyrimidin-4-one derivatives, the preparation and the pharmaceutical use thereof (2013-06-11),

2. 7745433 - 2-Substituted phenyl-5, 7-dihydrocarbyl-3, 7-dihydropyrrolo [2, 3-D] pyrimidin-4-one derivatives, the preparation and the pharmaceutical use thereof (2010-06-29),

3. 7741483 - Process for making substituted pyrrolo[2,3-d]pyrimidine derivatives as inhibitors of phosphodiesterase 5 (2010-06-22),

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

3 Patents

#96 in Tianjin

#8,360 in China

Tianjin, China

Tianjin North Pharma Sci-Tech Co., Ltd

Forward Citations = 0

2 inventors:

Yongfeng Wang (3 out of 10 patents)

Kejun Zhao (3 out of 3 patents)

Kejun No 32 Zhujiang Road Zhao (0 patent)

4. Yongfeng C35 Third Floor No 7 Wang (0 patent)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Tianjin North Pharma Sci-Tech Co., Ltd. Retrieved from https://idiyas.com/company/tianjin-north-pharma-sci-tech-company

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 (CIPO):

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]