Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5000853 | Process for the improved separation of clarified liquid from biomass in the biological treatment of sewage | Hanno Henkel, Friedhelm Sahlmen | 1991-03-19 |
| 4855052 | Foam-containing polyurethane (urea) compositions and process for the preparation thereof | — | 1989-08-08 |
| 4843105 | Process for the preparation of filler-containing, antionically modified polyurethane (urea) compositions, the polyurethane (urea) compositions so-obtained, and the use thereof | Kurt Mack | 1989-06-27 |
| 4834003 | Combustion of aqueous sewage sludge by the fluidized bed process | Friedhelm Sahlmen | 1989-05-30 |
| 4820415 | Polymer carrier masses as carriers in biochemical conversion processes in the aqueous phase | — | 1989-04-11 |
| 4801621 | Foam-containing polyurethane(urea) compositions and process for the preparation thereof | — | 1989-01-31 |
| 4749496 | Process for removing impurities from mixtures of water with water-miscible solvents | — | 1988-06-07 |
| 4735725 | Process for the improved separation of clarified liquid from biomass in the biological treatment of sewage | Hanno Henkel, Friedhelm Sahlmen | 1988-04-05 |
| 4734439 | Foam-containing polyurethane(urea) compositions and process for the preparation thereof | — | 1988-03-29 |
| 4608397 | Filler-containing polyurethane (urea) compositions prepared from prepolymers reacted with water in the presence of lignite or peat | — | 1986-08-26 |
| 4595709 | Process for the production of isocyanate polyaddition products | — | 1986-06-17 |
| 4595445 | Adhesive joining of surfaces using thermosetting polyurethane urea reactive adhesive compositions | Rudolf Hombach, Manfred Dollhausen, Heinrich Hess, Gerhard Grogler, Richard Kopp | 1986-06-17 |
| 4576718 | Use of water-absorbing, highly-filled polyurethane (urea) compositions for biological treatment of waste-containing liquids | Kurt Mack | 1986-03-18 |
| 4472558 | Process for carrying out reactions caused by the transport of substances | Clemens Casper, Henning Klussmann, Gunter Lehr, Johannes O. Sajben, Rudolf Binsack +1 more | 1984-09-18 |
| 4454259 | Process for the preparation of polyaddition products of isocyanates and denatured biomasses, their use as reactive fillers and as plant nutrients and a process for the production of sheets or shaped articles using the polyaddition products | Kuno Wagner | 1984-06-12 |
| 4393166 | Process for the preparation of polyaddition products of isocyanates and denatured biomasses, their use as reactive fillers and as plant nutrients and a process for the production of sheets or shaped articles using the polyaddition products | Kuno Wagner | 1983-07-12 |
| 4336365 | Process for the continuous preparation of polyisocyanates containing uretdione groups and their use as starting components for the production of polyurethane resins | Bernd Quiring, Claus Rathjen | 1982-06-22 |
| 4324716 | Solutions of polyisocyanate polyaddition products | Gert Jabs | 1982-04-13 |
| 4320208 | Process for the production of polyurethane plastics in which polyisocyanates are reacted with reactive organic fillers comprising biomasses | Kuno Wagner | 1982-03-16 |
| 4311800 | Process for working up cross-linked isocyanate distillation residues containing urea groups and use of the products of the process as starting components for the production of synthetic resins | — | 1982-01-19 |
| 4310449 | Process for the preparation of stable dispersions | — | 1982-01-12 |
| 4310448 | Process for the preparation of stable ionic dispersions | — | 1982-01-12 |
| 4305857 | Process for the preparation of stable dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds | — | 1981-12-15 |
| 4305858 | Process for the preparation of stable ionic dispersions of polyisocyanate-polyaddition products in hydroxyl containing compounds | — | 1981-12-15 |
| 4297456 | Process for working up isocyanate distillation residues | Kuno Wagner | 1981-10-27 |