Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6033442 | Use of aqueous solutions or dispersions of copolymers of carboxyl-group-containing monomers, ethylenically unsaturated acetals, ketals or orthocarboxylic acid esters and optionally other copolymerizable monomers as leather tanning agents | Walter Denzinger, Axel Kistenmacher, Gerhard Wolf, Michael Kneip, Knut Oppenlander | 2000-03-07 |
| 6007801 | Use of carboxyl-containing polysiloxanes in cosmetic formulations | Peter Hossel, Michael Kneip | 1999-12-28 |
| 5798147 | Process for coating and printing substrates | Erich Beck, Frank Meyer, Ulrich Poth, Karl Siemensmeyer, Claudia Sierakowski +6 more | 1998-08-25 |
| 5527360 | Fatliquoring, filling and hydrophobicizing leathers and furs | Hermann Birkhofer, Peter Danisch, Knut Oppenlaender | 1996-06-18 |
| 5433752 | Use of rection products of Homo- or copolymers based on monoethylenically unsaturated dicarboxylic anhydrides with amines or alcohols for fatliquoring and filling leather and fur skins | Hermann Birkhofer, Peter Danisch, Walter Denzinger, Heinrich Hartmann, Knut Oppenlaender | 1995-07-18 |
| 5420207 | Preparation of polyisobutylsuccinic anhydrides | Knut Oppenlaender | 1995-05-30 |
| 5286263 | Use of copolymers based on long-chain alkyl vinyl ethers and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent | Ortwin Schaffer, Herbert Bay, Karl Stork, Knut Oppenlaender, Walter Denzinger +1 more | 1994-02-15 |
| 5279613 | Copolymers based on long-chain olefins and ethylenically unsaturated dicarboxylic anhydrides for rendering leathers and skins water-repellent | Ortwin Schaffer, Herbert Bay, Karl Stork, Knut Oppenlaender, Walter Denzinger +1 more | 1994-01-18 |
| 5266165 | Paper sizing using copolymers of long-chain olefins and maleic anhydride in the form of the semiamides with morpholine | Arnold DeClercq, Walter Denzinger, Heinrich Hartmann, Knut Oppenlaender, Ulrich Riebeling | 1993-11-30 |
| 5124181 | Copolymers based on long-chain unsaturated esters and ethylenically unsaturated carboxylic acids for making leather and furs water repellent | Ortwin Schaffer, Herbert Bay, Karl Stork, Knut Oppenlaender, Walter Denzinger +1 more | 1992-06-23 |
| 5009670 | Fuels for gasoline engines | Franz-Dieter Martischius, Hans-Henning Vogel, Knut Oppenlaender, Walter Denzinger, Heinrich Hartmann | 1991-04-23 |
| 4978780 | Preparation of ether sulfonates and polyglycol ether sulfonates, and products prepared by this method | Rolf Fikentscher, Knut Oppenlaender, Karl Stork | 1990-12-18 |
| 4959077 | Fuels for gasoline engines | Franz-Dieter Martischius, Hans Peter Rath, Hans-Henning Vogel, Knut Oppenlaender, Walter Denzinger +1 more | 1990-09-25 |
| 4767707 | Immobilization of enzymes with a water-soluble glycidyl ether | Stefan Marcinowski, Axel Sanner, Chung-Ji Tschang, Wolfgang Ladner | 1988-08-30 |
| 4734535 | Preparation of aliphatic chlorine compounds | Knut Oppenlaender | 1988-03-29 |
| 4496439 | Acidic zinc-plating bath | Knut Oppenlaender, Albert Hettche, Christos Vamvakaris | 1985-01-29 |
| 4375565 | Low-foaming, biodegradable alkoxylation products terminated with glycerine ether radicals, and a process for their preparation | Erhard Klahr, Wolfgang Trieselt | 1983-03-01 |
| 4239491 | Dyeing and printing of textiles with disperse dyes | Ulrich Baumgarte, Knut Oppenlaender, Harald Schlueter, Harro Petersen, Rainer Strickler | 1980-12-16 |
| 4229174 | Dispersant for textile dyeing and optical brightening | Paul Boerzel, Peter Freyberg, Rudi Widder | 1980-10-21 |
| 4200733 | Iodine-containing block copolymers of 1,4-butylene oxide and ethylene oxide | Johannes Perner, Rolf Fikentscher, Paul Diessel | 1980-04-29 |