| 6984116 |
Process and apparatus for crystallization of polytrimethylene terephthalate (PTT) |
James Gao Lee, Thomas Louis De Lellis, Edward James Denton, Kevin Allen, Stefan Deiss |
2006-01-10 |
| 6800718 |
Process for producing polytrimethylene terephthalate (PTT) |
Fritz Wilhelm, Eckhard Seidel, Hans Reitz, Ulrich Thiele, Donald R. Kelsey +2 more |
2004-10-05 |
| 6740733 |
Process and apparatus for crystallization of polytrimethylene terephthalate (PTT) |
James Gao Lee, Thomas Louis De Lellis, Edward James Denton, Kevin Allen, Stefan Deiss |
2004-05-25 |
| 5576414 |
Process for generating a vacuum in production of polycarbonate |
Fritz Wilhelm, Rudolf Kaempf, Walter W. Wenzel |
1996-11-19 |
| 5466776 |
Process for the multistage generation of vacuum for polyester production |
Juergen Krautstrunk |
1995-11-14 |
| 4499261 |
Process for the continuous production of polybutylene terephthalate of high molecular weight |
Helmut Heinze, Fritz Wilhelm, Ferdinand Finkeldei |
1985-02-12 |
