Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9321971 | Removal of asphaltene contaminants from hydrocarbon streams using carbon based adsorbents | Marcel Janssen, John D. Y. Ou, Glenn A. Heeter | 2016-04-26 |
| 6639117 | Rejuvenating SAPO molecular sieve by freeze drying | Marcel Janssen, Kenneth R. Clem | 2003-10-28 |
| 6537941 | Rejuvenating SAPO molecular sieve by freeze drying | Marcel Janssen, Kenneth R. Clem | 2003-03-25 |
| 5146040 | Process for separating dimethylnaphthalene isomers with zeolite L agglomerates | Johannes Petrus Verduijn, Mechilium Johannes Gerardus Janssen, Cornelis B. De Gruijter, Wicher T. Koetsier | 1992-09-08 |
| 5064630 | Zeolite L preparation | Johannes Petrus Verduijn, Mechilium Johannes Gerardus Janssen, Cornelis B. De Gruijter, Wicher T. Koetsier | 1991-11-12 |