WP

Willem Posthumus

Shell Oil Compny: 2 patents #1,477 of 4,423Top 35%
AB Akzo Nobel Chemicals International B.V: 1 patents #135 of 276Top 50%
Overall (All Time): #1,481,383 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10040900 Thermosetting resin composition Iris Hilker, Johan Franz Gradus Antonius Jansen 2018-08-07
9174872 Sulphur cement products Catherine Frances Smura, Guy Lode Magda Maria Verbist 2015-11-03
9017472 Process for preparing a sulphur cement product Paul De Boer, Yiu Chung Cheng, Michael David Lankshear, Catherine Frances Smura, Guy Lode Magda Maria Verbist 2015-04-28