Issued Patents All Time
Showing 26–50 of 76 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8487025 | Branched melt polycarbonate with low content of defective structures | Stephan Konrad, Karl-Heinz Köhler, Christian Münnich, Rolf Wehrmann | 2013-07-16 |
| 8470934 | Polycarbonate compositions having improved surface hardness | Rolf Wehrmann | 2013-06-25 |
| 8389664 | High molecular weight, random, bisphenol based copoly(phosphonate carbonate)s | Dieter Freitag, Pin Go, Lawino Kagumba, Stephan Konrad, Berit Krauter +3 more | 2013-03-05 |
| 8329852 | Copolycarbonates having improved surface hardness | Rolf Wehrmann, Alexander Karbach | 2012-12-11 |
| 8202961 | Alkylphenol for adjusting the molecular weight, and polycarbonate compositions having improved properties | Rolf Wehrmann, Bert Ruytinx | 2012-06-19 |
| 8163822 | Polycarbonate composition with improved melt-flowability | Stephan Konrad, Rolf Wehrmann, Karl-Heinz Köhler, Marc Buts | 2012-04-24 |
| 8158745 | Polycarbonates having rearrangement structures, cyclic and linear oligomers and also flow behavior | Rolf Wehrmann | 2012-04-17 |
| 8110649 | Polycarbonates comprising cyclic oligomers and having an improved flow behavior | Rolf Wehrmann | 2012-02-07 |
| 7968671 | Alkylphenol-terminated copolycarbonates, processes for preparing the same, molding compositions containing the same, and articles prepared therefrom | Rolf Wehrmann | 2011-06-28 |
| 7863403 | Process for the preparation of polycarbonates and diaryl carbonate | Pieter Ooms | 2011-01-04 |
| 7691477 | Polyformals as a coextrusion protective layer on polycarbonate | Rolf Wehrmann, Sylvia Braun, Claus Rüdiger, Marco Roelofs, Wolfgang Nising +4 more | 2010-04-06 |
| 7547755 | (Co)polycarbonates having improved adhesion to metals | — | 2009-06-16 |
| 7425358 | Copolycarbonates having improved flowability | Rolf Wehrmann, Michael Erkelenz, Alexander Meyer, Melanie Mothrath | 2008-09-16 |
| 7399820 | Cyclic oligoformals in polycarbonate | Rolf Wehrmann | 2008-07-15 |
| 7358326 | Multifunctional 3,4-alkylenedioxythiophene derivatives and electrically conductive polymers containing them | Rolf Wehrmann | 2008-04-15 |
| 7345133 | Branched polycarbonates | Rolf Wehrmann, Ulrich Blaschke, Michael Erkelenz | 2008-03-18 |
| 7332560 | Thermoplastic molding compositions having reduced water absorption | Rolf Wehrmann | 2008-02-19 |
| 7314897 | Aromatic formals as additives for lowering the water uptake of polycarbonates | Rolf Wehrmann, Friedrich-Karl Bruder | 2008-01-01 |
| 7279544 | Transesterification process for the production of polycarbonates having a low content of volatile compounds | Uwe Hucks, Melanie Mothrath, Thomas König, Lydia Simon, Marc Buts +1 more | 2007-10-09 |
| 7250483 | Inhibition of catalytically active impurities in polycarbonate by the melt transesterification process | Melanie Mothrath, Peter Snobl, Lothar Bunzel, Thomas Pfingst, Marc Buts +1 more | 2007-07-31 |
| 7208564 | Branched polyformals and copolyformals their preparation and use | Rolf Wehrmann, Heiner Onckels | 2007-04-24 |
| 7199208 | Polyformals and copolyformals with reduced water absorption, production and use thereof | Rolf Wehrmann | 2007-04-03 |
| 7183419 | 3,4-dioxythiophene derivatives | Rolf Wehrmann | 2007-02-27 |
| 7132497 | Aromatic dihydroxy compound useful for the preparation of (CO)polycarbonates | Rolf Wehrmann | 2006-11-07 |
| 6940626 | Multilayered arrangement for electro-optical device | Rolf Wehrmann, Alexander Karbach | 2005-09-06 |