Issued Patents All Time
Showing 1–25 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7732211 | Method and apparatus for screening of polycondensation catalysts | Kathleen Suzanne Kiibler | 2010-06-08 |
| 7381787 | Polytrimethylene terephthalate having a low level of acrolein and a process for producing the same | Cecilia Zuqi Tse, Robert Lawrence Blackbourn, Holger Bachmann, Eckhard Seidel | 2008-06-03 |
| 7196159 | Process for producing polytrimethylene terephthalate | Cecilia Zuqi Tse, Emery Johnson | 2007-03-27 |
| 6800718 | Process for producing polytrimethylene terephthalate (PTT) | Fritz Wilhelm, Eckhard Seidel, Hans Reitz, Ulrich Thiele, Klaus Mackensen +2 more | 2004-10-05 |
| 6657044 | Process for making polytrimethylene terephthalate | Kathleen Suzanne Kiibler, Wen-Tzung Tang | 2003-12-02 |
| 6576774 | Process for recycling polytrimethylene terephthalate cyclic dimer | Betty Marrou Scardino | 2003-06-10 |
| 6512080 | Process of producing polytrimethylene terephthalate (PTT) | Robert Lawrence Blackbourn, Robert Stephen Tomaskovic, Hans Reitz, Eckhard Seidel, Fritz Wilhelm | 2003-01-28 |
| 6509438 | Optimum dipropylene glycol content polytrimethylene terephthalate compositions | Betty Marrou Scardino, Kailash Dangayach, Houston Brown, Hans Reitz, Eckhard Seidel +1 more | 2003-01-21 |
| 6326456 | Process of producing polytrimethylene terephthalate (PTT) | Robert Lawrence Blackbourn, Robert Stephen Tomaskovic, Hans Reitz, Eckhard Seidel, Fritz Wilhelm | 2001-12-04 |
| 6277947 | Process of producing polytrimethylene terephthalate (PTT) | Robert Lawrence Blackbourn, Robert Stephen Tomaskovic, Hans Reitz, Eckhard Seidel, Fritz Wilhelm | 2001-08-21 |
| 6245879 | Purification of 1,3-propanediol in carbonyl-containing stream | Betty Marrou Scardino, Steven Charles Zronek | 2001-06-12 |
| 6242558 | Modified polytrimethylene terephthalate | — | 2001-06-05 |
| 6093786 | Process for preparing polytrimethylene terephthalate | — | 2000-07-25 |
| 5955562 | Surface derivatization of polyketones polymers | Carlton E. Ash | 1999-09-21 |
| 5705575 | Copolyester composition | — | 1998-01-06 |
| 5578686 | Phenolic allyl ethers | Pen-Chung Wang | 1996-11-26 |
| 5527973 | Purification of 1,3-propanediol | — | 1996-06-18 |
| 5495051 | Phenolic allyl ethers | Pen-Chung Wang | 1996-02-27 |
| 5459213 | Catalyst system for olefin polymerization | — | 1995-10-17 |
| 5459229 | By product stream purification in the preparation of 1,3-propanediol-based polyesters | Charles C. Chou | 1995-10-17 |
| 5406003 | Phenolic compounds | Pen-Chung Wang | 1995-04-11 |
| 5405924 | Imido transition metal complex metathesis catalysts | — | 1995-04-11 |
| 5382713 | Phenolic compounds | Pen-Chung Wang | 1995-01-17 |
| 5369195 | Polymerization of cyclic olefins | — | 1994-11-29 |
| 5359023 | Cyclohexanenorbornane epoxy resin with curing agent | Pen-Chung Wang | 1994-10-25 |