RS

Rudolf Sipkema

SB Stamicarbon B.V.: 2 patents #111 of 427Top 30%
Overall (All Time): #2,328,220 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4801745 Improved process for the preparation of urea Jozef Hubert Meessen 1989-01-31
4433146 Process for the preparation of melamine Jozeph H. M. Beckers 1984-02-21