Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888120 | Water-based drilling and well-servicing fluids with swellable, synthetic layer silicates | Heinz Mueller, Claus-Peter Herold, Stephan van Tapavizca, Hans Dolhaine, Wolfgang von Rybinski | 1989-12-19 |
| 4861510 | Porous layer silicate/sodium sulfate agglomerate | Elman Wilms, Dieter Jung, Herbert Linsenbold, Lothar Pioch | 1989-08-29 |
| 4861516 | Laundry pretreatment composition for oily and greasy soil | Claus-Peter Kurzendoerfer | 1989-08-29 |
| 4846990 | Fabric-softening detergent | Horst Upadek | 1989-07-11 |
| 4839066 | Fabric-softening detergent | Wolfgang von Rybinski, Horst Upadek | 1989-06-13 |