Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
DK

David Kaczan

Basf Se: 2 patents #5,851 of 13,826Top 45%
Southgate, MI: #56 of 166 inventorsTop 35%
Michigan: #35,034 of 86,293 inventorsTop 45%
Overall (All Time): #2,098,681 of 4,157,543Top 55%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
8308975 Polyol formed from an epoxidized oil Yeonsuk Roh, Rajesh Kumar, Cheng-Le Zhao, Theodore M. Smiecinski 2012-11-13
8084631 Polyol formed from an EPOXIDIZED oil Yeonsuk Roh, Rajesh Kumar, Cheng-Le Zhao, Theodore M. Smiecinski 2011-12-27