| 6291734 |
Integrated low pressure depropanizer/debutanizer column |
— |
2001-09-18 |
| 6077985 |
Integrated deethanizer/ethylene fractionation column |
— |
2000-06-20 |
| 5372609 |
Self-tanning, pretanning and assist tanning of pelts and skin pelts and retanning of leather and skin |
Juergen Weiser, Wolfgang Reuther, Hermann Birkhofer, Ortwin Schaffer |
1994-12-13 |
| 5342916 |
Condensation polymers of sulfonated phenols, urea, other organic nitrogen-bases, and formaldehyde, and their use as tanning agents and as spraying aids for redispersible polymer powders |
Juergen Weiser, Wolfgang Reuther, Ortwin Schaffer, Gernot Franzmann, Thomas Schwerzel +3 more |
1994-08-30 |
| 5338517 |
Catalytic distillation column reactor and tray |
William T. Evans |
1994-08-16 |
| 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, Norbert Greif, 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, Norbert Greif, Knut Oppenlaender, Walter Denzinger +1 more |
1994-01-18 |
| 5155164 |
Products of the condensation of phenolmonosulfonic acids, dihydroxydiphenyl sulfones, urea and formaldehyde |
Hermann Graf, Adolf Stuebinger, Klaus Lorenz, Ortwin Schaffer |
1992-10-13 |
| 5147644 |
Use of mixtures of polyglycerol fatty esters as emulsifiers in cosmetic and pharmaceutical formulations |
Knut Oppenlaender, Brigette Wegner, Franz Frosch, Hans-Ulrich Wekel |
1992-09-15 |
| 5124181 |
Copolymers based on long-chain unsaturated esters and ethylenically unsaturated carboxylic acids for making leather and furs water repellent |
Ortwin Schaffer, Herbert Bay, Norbert Greif, Knut Oppenlaender, Walter Denzinger +1 more |
1992-06-23 |
| 4978780 |
Preparation of ether sulfonates and polyglycol ether sulfonates, and products prepared by this method |
Rolf Fikentscher, Norbert Greif, Knut Oppenlaender |
1990-12-18 |
| 4675025 |
Aqueous coal dispersions |
Knut Oppenlaender, Friedrich Hovemann, Erich Schwartz |
1987-06-23 |
| 4657560 |
Aqueous coal dispersions |
Knut Oppenlaender, Friedrich Hovemann, Erich Schwartz |
1987-04-14 |
| 4517114 |
Inhibitors against corrosion caused by CO.sub.2 and H.sub.2 S in water-in-oil emulsions |
Knut Oppenlaender, Klaus Barthold |
1985-05-14 |
| 4436639 |
Ammonium salts of polymaleic acids and use as corrosion inhibitors in water-in-oil emulsions |
Knut Oppenlaender, Klaus Barthold |
1984-03-13 |
| 4435298 |
Ammonium salts of polymaleic acids, and their use as corrosion inhibitors in mineral oils |
Knut Oppenlaender, Hans-Henning Vogel, Erich Schwartz, Claus P. Jakob |
1984-03-06 |
| 4388213 |
Cyclic amidine based corrosion inhibitors which inhibit corrosion caused by CO.sub.2 and H.sub.2 S |
Knut Oppenlaender, Klaus Barthold |
1983-06-14 |
| 4388214 |
Imidazoline based corrosion inhibitors which inhibit corrosion caused by CO.sub.2 and H.sub.2 S |
Knut Oppenlaender, Klaus Barthold |
1983-06-14 |
| 4260724 |
Preparation of polymaleic acids from maleic anhydride in the presence of acetic anhydride and of hydrogen peroxide |
Johannes Perner, Knut Oppenlaender |
1981-04-07 |
| 4218218 |
Stable finely dispersed aqueous formulations of disperse dyes and optical brighteners, and their use |
Ewald Daubach, Manfred Herrmann, Knut Oppenlaender |
1980-08-19 |
| 4189445 |
Surface-active phenolic derivatives |
Knut Oppenlaender, Ewald Daubach, Manfred Herrmann |
1980-02-19 |
