Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4474681 | Production of aqueous suspensions of finely divided titanium dioxide | Horst Belde, Hans Langenfelder | 1984-10-02 |
| 4464266 | Removal of caprolactam and its oligomers from cooling water containing these compounds | Hugo Strehler, Robert Kegel, Guenter Valentin | 1984-08-07 |
| 4446089 | Process and apparatus for the production of plastic strands | Hugo Strehler, Guenter Valentin | 1984-05-01 |
| 4439933 | Apparatus for drying and heating nylon granules | Ernst Dietrich, Ernst Guenther, Ernst Kissel, Hermann Linge, Eckart Neumann +1 more | 1984-04-03 |
| 4436897 | Preparation of polycaprolactam with aqueous extract containing caprolactam and caprolactam oligomers | Hugo Strehler, Friedrich Urbanek | 1984-03-13 |
| 4429107 | Continuous preparation of polycaprolactam wherein constant composition is maintained | Hugo Strehler, Guenter Valentin, Friedrich Urbanek | 1984-01-31 |
| 4388425 | Production of concentrates of titanium dioxide in polycaprolactam | Hugo Strehler, Guenter Valentin | 1983-06-14 |
| 4354020 | Continuous preparation of polycaprolactam in vertical tubular reactor | Rudi-Heinz Rotzoll, Paul Matthies, Guenter Valentin | 1982-10-12 |
| 4258178 | Discharging granular linear polycondensates | Guenter Valentin | 1981-03-24 |
| 4233429 | Process for removing volatiles evolved from plastic melts | Guenter Valentin, Robert Kegel, Helmut Kuhn | 1980-11-11 |
| 4204049 | Hydrolytic polymerization of epsilon-caprolactam | Paul Matthies, Joachim Kunde | 1980-05-20 |
| 4202375 | Process and apparatus for achieving a uniform flow profile | Hans Pirzer, Ernst Guenther, Eckart Neumann, Ernst Dietrich | 1980-05-13 |