Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5863971 | Process for preparing bitumen compositions | Rudolf Baanders, Koen Steernberg | 1999-01-26 |
| 4876130 | Bituminous composition and use thereof as cold-applicable self-adhesive compound | Willem C. Vonk | 1989-10-24 |
| 4755277 | Process for the preparation of a hydrocarbonaceous distillate and a residue | Jacobus H. Breuker, Johannes L. M. Syrier | 1988-07-05 |
| 4738996 | Asphaltic coating compositions | Willem C. Vonk | 1988-04-19 |
| 4629754 | Pigmentable composition of matter comprising a mineral lubricating oil extract and modified petroleum and/or coumarone-indene resin | Johannes L. M. Syrier, Willem C. Vonk | 1986-12-16 |
| 4332703 | Plastic bituminous compositions | Jan Lijzenga, Thomas C. Blanken | 1982-06-01 |