Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6740404 | HMLS-fibers made of polyester and a spin-stretch process for its production | Joachim Cziollek, Werner Mrose, Dietmar Wandel, Helmut Schwind, Wolfgang Janas | 2004-05-25 |
| 6667003 | Method for the manufacture of synthetic fibers from a melt mixture based on fiber forming polymers | Helmut Schwind, Wolfgang Janas, Alexander Klein, Bernd Kretschmann | 2003-12-23 |
| 6656583 | High-strength polyester threads and method for producing the same | Joachim Cziollek, Werner Mrose, Dietmar Wandel, Helmut Schwind, Wolfgang Janas | 2003-12-02 |
| 6576339 | Polyester-staple fibres and method for the production thereof | Ingo Cordes, Dietmar Wandel, Helmut Schwind, Wolfgang Janas | 2003-06-10 |
| 5849946 | Method of obtaining water-free 2-trimethylammoniumethyl methacrylate chloride (TMAC) from an aqueous solution | Peter J. Arndt, Klaus Gottmann, Thomas Kehr | 1998-12-15 |
| 5567826 | Process for the production of terminally nitrogen heterocycle substituted (meth)acrylate by the use of a mixture of an alkali metal and alkaline earth metal catalyst | Joachim Knebel, Peter J. Arndt | 1996-10-22 |
| 4996109 | Hard foam cores for laminates | Manfred Krieg, Norbert Rau | 1991-02-26 |
| 4990588 | Temperature resistant aromatic polyethers | Joachim Knebel, Joachim Vetter | 1991-02-05 |
| 4931594 | Method for making aromatic bisphenols | Joachim Knebel, Volker Kerscher | 1990-06-05 |
| 4889909 | Thermoplastic polyarylene ethers | Sigmund Besecke, Joachim Knebel, Guenter Schroeder | 1989-12-26 |
| 4774349 | Method of preparing N-methylphosphonic acid diesters of acrylic and methacrylic acid amines from methylol | Klaus Langerbeins | 1988-09-27 |
| 4745224 | Methods for making tertiary phosphine oxides | Joachim Knebel | 1988-05-17 |
| 4745225 | Phosphorus-containing polyarylene ethers | Joachim Knebel | 1988-05-17 |
| 4698448 | Method for making aromatic phosphorus compounds | Siegmund Besecke, Achim Riemann, Guenther Schroeder | 1987-10-06 |
| 4696993 | Phosphorus-containing polyarlene ether | Joachim Knebel, Guenter Schroeder | 1987-09-29 |
| 4675458 | Method for making 9,9-bis-(4-hydroxyphenyl)-fluorene | Achim Riemann | 1987-06-23 |
| 4673730 | Method for recovering aromatic polyethers | Hermann Siegert | 1987-06-16 |
| 4638099 | Method for making 4,4'-dihydroxydiphenyl ether | Achim Riemann | 1987-01-20 |
| 4492805 | Polyarylene ethers containing phosphorus | Siegmund Besecke, Gunter Schroder, Winfried Wunderlich | 1985-01-08 |
| 4472570 | Polyarylene esters containing phosphorus | Siegmund Besecke, Guenter Schroeder, Winfried Wunderlich | 1984-09-18 |
| 4463159 | Polyarylene esters containing phosphorus | Siegmund Besecke, Guenter Schroeder, Winfried Wunderlich | 1984-07-31 |