WL

Willem A. Van Leeuwen

IB Internationale Otrool Maatschappij Octropa B.V.: 1 patents #30 of 132Top 25%
UB Unilever Patent Holdings B.V.: 1 patents #167 of 552Top 35%
📍 Vlaardingen, NL: #135 of 457 inventorsTop 30%
Overall (All Time): #2,323,311 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4920089 Hydrogenation catalyst Wilhelmus P. Van Beek, Wilma Den Hoed, Eduard K. Poels, Cornelis Visser 1990-04-24
4665048 Catalyst suitable for hydrotreating Eduard K. Poels, Leendert H. Staal, Dirk Verzijl 1987-05-12