Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5618963 | Process for the preparation of sterically hindered hydroxybenzylphosphonates | Thomas Engert, Walter Wolf | 1997-04-08 |
| 5531075 | Process to transport acetylene | Hartmut Behringer, Siegfried Pottkamper, Gerrit Marcks | 1996-07-02 |
| 4916907 | Magnetocaloric monostable and bistable inductors for electrical energy and refrigeration | Heinz Munk | 1990-04-17 |
| 4757156 | Process for making tertiary alkylphosphines | Norbert Weferling, Georg Elsner, Friedrich-Karl Frorath | 1988-07-12 |
| 4731448 | Process for the preparation of 1-(2-hydroxyethyl)-2,2,6,6-tetramethyl-4-piperidinol | Heinz Issler, Siegfried Kintopf, Lutz Konig | 1988-03-15 |
| 4554368 | Continuous process for the preparation of alkyltin thiocarboxylic acid esters | Rudolf Maul, Walter Wolf | 1985-11-19 |
| 4540558 | Process for removing organic contaminants from wet-processed phosphoric acid | Reinhard Gradl, Gero Heymer, Gunther Schimmel | 1985-09-10 |
| 4530769 | Process for separating carbon black from an aqueous suspension | Manfred Wolter, Friedrich-Wilhelm Dorn, Gero Heymer | 1985-07-23 |
| 4517163 | Process for making titanium dioxide concentrates | Klaus Jodden, Gero Heymer | 1985-05-14 |
| 4447400 | Metering device | Hermann Klein, Klaus Lehr | 1984-05-08 |
| 4402812 | Electrolytic cell | Herbert Panter, Hermann Klein, Gerhard Nolte, Eberhard Preisler, Gunter Reichert | 1983-09-06 |
| 4355010 | Process for removing phosphorus in vapor form and phosphanes from gas mixtures | Klaus Jodden, Friedrich-Wilhelm Dorn, Gero Heymer | 1982-10-19 |
| 4330504 | Apparatus for making red phosphorus | Klaus Lehr, Gero Heymer, Ursus Thummler | 1982-05-18 |
| 4278647 | Production of phosphorous acid | Klaus Jodden, Gero Heymer | 1981-07-14 |
| 4273752 | Process for making red phosphorus | Klaus Lehr, Gero Heymer, Ursus Thummler | 1981-06-16 |