Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5718821 | Copolymers of ethylenically unsaturated carboxylic acid esters with polyoxyalkylene ethers of lower, unsaturated alcohols as flow-improving agents for paraffin containing oils | Matthias Krull, Sigmar-Peter von Halasz, Werner Reimann, Horst Geiss | 1998-02-17 |
| 5439981 | Graft polymers, their preparation and use as pour point depressants and flow improvers for crude oils, residual oils and middle distillates | Michael Feustel, Matthias Krull, Werner Reimann | 1995-08-08 |
| 5349019 | New copolymers, mixtures thereof with poly(meth)acrylate esters and the use thereof for improving the cold fluidity of crude oils | Herbert Wirtz, Sigmar-Peter von Halasz, Michael Feustel | 1994-09-20 |
| 4985048 | Polymer mixtures for improving the low-temperature flow properties of mineral oil distillates | Herbert Wirtz, Michael Feustel | 1991-01-15 |
| 4743666 | Water-soluble copolymers with pendant phosphonic, sulphonic and amide groups | Friedrich Engelhardt, Klaus Kuhlein, Walter Dursch, Hans-Jerg Kleiner | 1988-05-10 |
| 4585845 | Phosphonic acid cross-linked hydrophilic copolymers | Friedrich Engelhardt, Klaus Kuhlein, Walter Dursch, Hans-Jerg Kleiner | 1986-04-29 |
| 4507440 | Cross-linkable and cross linked macromolecular compositions wherein cross-linking is by structural bridges of the formula --NR.sup.x --CH.dbd.N--CO-- and their preparation | Friedrich Engelhardt, Steffen Piesch, Jeffery C. Dawson | 1985-03-26 |
| 4237243 | Use of cross-linked polymers to increase the viscosity in cosmetic, pharmaceutical and technical compositions | Jochen M. Quack, Alwin Reng, Friedrich Engelhardt, Joachim Ribka | 1980-12-02 |
| 4237249 | Process for the preparation of crosslinked copolymers, the process products obtained, and their use in textile printing | Friedrich Engelhardt, Joachim Ribka, Wolfram Schidlo | 1980-12-02 |