Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696987 | Process for the preparation of polymers of vinylphosphonic acid in protic solvents | Walter Dursch, Walter Herwig | 1987-09-29 |
| 4686243 | Copolymer, a process for its preparation and its use as enzyme supports | Karl-Heinz Keil, Dieter Wullbrandt, Reinhold Keller | 1987-08-11 |
| 4587283 | Cement slurries for deep holes, with a copolymer content for reducing the water loss | Martin Hille, Wolfgang Friede, Heinz Wittkus, Ulrich Riegel | 1986-05-06 |
| 4585845 | Phosphonic acid cross-linked hydrophilic copolymers | Klaus Kuhlein, Juliane Balzer, Walter Dursch, Hans-Jerg Kleiner | 1986-04-29 |
| 4551513 | Water soluble copolymers | Klaus Kuhlein, Ulrich Riegel, Sigmar-Peter von Halasz, Jeffery C. Dawson, Anthony R. Reed | 1985-11-05 |
| 4521579 | High molecular weight water-soluble polymers useful in deoiling sand and rock masses | Hermann Schmitz, Walter Gulden, Jorg Hax | 1985-06-04 |
| 4518745 | Metal chelates of water soluble copolymers | Ulrich Greiner | 1985-05-21 |
| 4507440 | Cross-linkable and cross linked macromolecular compositions wherein cross-linking is by structural bridges of the formula --NR.sup.x --CH.dbd.N--CO-- and their preparation | Steffen Piesch, Juliane Balzer, Jeffery C. Dawson | 1985-03-26 |
| 4500437 | Water soluble copolymers for use in fracture-acidizing of wells | Klaus Kuhlein, Ulrich Riegel, Sigmar-Peter von Halasz, Jeffery C. Dawson, Anthony R. Reed | 1985-02-19 |
| 4499232 | Water soluble, crosslinkable polymer compositions, their preparation and use | Steffen Piesch, Juliane Balzar, Jeffery C. Dawson | 1985-02-12 |
| 4471097 | Water soluble copolymers containing vinyl imidazole as drilling fluid additives | Klaus-Martin Uhl, James K. Bannerman, Arvind D. Patel | 1984-09-11 |
| 4463165 | Water-dispersible polyester, its preparation, and its use as a hydrophiling agent | Karl Hintermeier, Otto Smerz, Hans Wagener | 1984-07-31 |
| 4451631 | Agent and method for deoiling sand and rock masses | Hermann Schmitz, Walter Gulden, Jorg Hax | 1984-05-29 |
| 4407321 | Drag reducing agents | Hans Wilski, Werner Interthal | 1983-10-04 |
| 4401836 | Modified polyvinyl alcohol and its use as a sizing agent | Rolf Kleber | 1983-08-30 |
| 4378446 | Acrylate-modified melamine resin which is stable on storage, its preparation and its use | Wilhelm Adam, Curt A. Wagner, Renate Konrad, Ulrich Riegel, Georg W. Eckhardt +1 more | 1983-03-29 |
| 4357245 | Water-soluble copolymer and its preparation | Ulrich Riegel, Martin Hille, Heinz Wittkus | 1982-11-02 |
| 4323363 | Dyeing of mixed fibers | Gert Brachten, Heinz Helling, Joachim Ribka | 1982-04-06 |
| 4320060 | Process for the preparation of derivatives of 3-(4-hydroxy-anilino)carbazole | Steffen Piesch, Herbert Wille, Wolf Weidemuller, Artur Meyer | 1982-03-16 |
| 4314052 | Polyester which is soluble or dispersible in water, a process for its preparation and its use as a levelling auxiliary, levelling auxiliaries and processes for uniform dyeing | Karl Hintermeier, Joachim Ribka, Walter Dursch, Walter Rupp | 1982-02-02 |
| 4309523 | Water-soluble copolymer of acrylamidomethylpropanesulfonic acids salts | Ulrich Riegel, Martin Hille, Heinz Wittkus | 1982-01-05 |
| 4304569 | Formulation for brightening synthetic fibers and its preparation and use | Karl Hintermeier, Herbert Friedrich, Thomas Martini | 1981-12-08 |
| 4300903 | Padding auxiliaries and processes for dyeing cellulose fibers or mixtures of cellulose fibers and synthetic fibers with sulphur dyestuffs, sulphur vat dyestuffs, vat dyestuffs and reactive dyestuffs | Karl-Heinz Keil, Gerhard Weckler, Klaus Sternberger | 1981-11-17 |
| 4252532 | Process for dyeing evenly synthetic fibrous materials | Karl Hintermeier, Joachim Ribka, Ralf Zimmermann | 1981-02-24 |
| 4250296 | Levelling agent and process for the even dyeing of materials made of synthetic fibers | Gerhard Weckler, Hans J. Hauss, Karl Hintermeier | 1981-02-10 |