DH

Douglas K. Hillshaffer

ST Stepan: 1 patents #127 of 221Top 60%
Overall (All Time): #3,441,433 of 4,157,543Top 85%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
6855844 Phtalic anhydride based polyester-ether polyols and double metal cyanide catalyst system for preparing same Eric Geiger 2005-02-15