Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8143367 | Method for the esterification of terephtalic acid with butanediol, method for the manufacture of polybutylene terephtalate and a device therefor | Michael Reisen | 2012-03-27 |
| 8017717 | Method of producing polyesters | Michael Reisen, Ludwig Hoelting, Peter Seidel, Peter Reichwein | 2011-09-13 |
| 7850926 | Process of discontinuous polycondensation and stirring reactor thereof | Ferdinand Finkeldei | 2010-12-14 |
| 7550116 | Method for producing polyesters and a disk ring reactor for the method | Michael Reisen, Ludwig Holting, Peter Seidel, Peter Reichwein | 2009-06-23 |
| 7244806 | Method and device for the continuous production of polyesters | Michael Reisen | 2007-07-17 |
| 7153927 | Process of continuously producing polyesters or copolyesters | Michael Reisen | 2006-12-26 |
| 7084234 | Method and device for producing polyesters, copolyesters and polycarbonates | Michael Reisen | 2006-08-01 |
| 6967235 | Method for the production of polybutylene terephthalate | Eckhard Seidel | 2005-11-22 |
| 6838543 | Method for producing polycarbonates | Rudolf Kaempf | 2005-01-04 |
| 6800718 | Process for producing polytrimethylene terephthalate (PTT) | Eckhard Seidel, Hans Reitz, Ulrich Thiele, Klaus Mackensen, Donald R. Kelsey +2 more | 2004-10-05 |
| 6512080 | Process of producing polytrimethylene terephthalate (PTT) | Donald R. Kelsey, Robert Lawrence Blackbourn, Robert Stephen Tomaskovic, Hans Reitz, Eckhard Seidel | 2003-01-28 |
| 6509438 | Optimum dipropylene glycol content polytrimethylene terephthalate compositions | Donald R. Kelsey, Betty Marrou Scardino, Kailash Dangayach, Houston Brown, Hans Reitz +1 more | 2003-01-21 |
| 6326456 | Process of producing polytrimethylene terephthalate (PTT) | Donald R. Kelsey, Robert Lawrence Blackbourn, Robert Stephen Tomaskovic, Hans Reitz, Eckhard Seidel | 2001-12-04 |
| 6277947 | Process of producing polytrimethylene terephthalate (PTT) | Donald R. Kelsey, Robert Lawrence Blackbourn, Robert Stephen Tomaskovic, Hans Reitz, Eckhard Seidel | 2001-08-21 |
| 5576414 | Process for generating a vacuum in production of polycarbonate | Rudolf Kaempf, Walter W. Wenzel, Klaus Mackensen | 1996-11-19 |
| 5563209 | Process for the reduction of carboxyl-end groups of linear polyesters | Heinz-Dieter Schumann, Rudolf Kaempf | 1996-10-08 |
| 5055273 | Apparatus for processing high viscosity materials | Heinz-Gunter Witt, Ludwig Holting | 1991-10-08 |
| 4680376 | Process for the continuous production of high-molecular polybutyleneterephthalate | Helmut Heinze | 1987-07-14 |
| 4499261 | Process for the continuous production of polybutylene terephthalate of high molecular weight | Helmut Heinze, Klaus Mackensen, Ferdinand Finkeldei | 1985-02-12 |