Issued Patents All Time
Showing 1–25 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6992124 | Polyolefin molding compound for producing calendered films/sheets | Christian Wick, Alexander Lichtblau | 2006-01-31 |
| 6491853 | Storage-stable plastics additives | Karl Gaa, Günter Nowy, Matthias Zäh | 2002-12-10 |
| 6420461 | Compounds based on polyalkyl-1-oxadiazaspirodecane compounds | Thomas Stahrfeldt, Mathias Mehrer, Matthias Zäh | 2002-07-16 |
| 6225385 | Oligomeric stabilizer mixture | Thomas Stahrfeldt, Alexander Lichtblau, Karl Gaa | 2001-05-01 |
| 6174940 | Synergistic stabilizer mixture based on polyalkyl-1-oxa-diazaspirodecane compounds | Thomas Stahrfeldt, Mathias Mehrer, Matthias Zäh | 2001-01-16 |
| 6013706 | Process for the preparation of hyrolysis-stable trivalent phosphorus compounds and their use as stabilizers for thermoplastics | Hans-Jerg Kleiner, Dieter Regnat | 2000-01-11 |
| 5919933 | Light stabilizers based on sterically hindered amines | Karl Gaa, Matthias Zäh, Mathias Mehrer, Thomas Stahrfeldt | 1999-07-06 |
| 5856385 | Additive mixture having a nucleating action for plastics compositions | Mathias Mehrer, Thomas Stahrfeldt | 1999-01-05 |
| 5852159 | Plastic with reduced sulfur uptake rate | Matthias Zäh, Karl Gaa, Klaus Keck-Antoine | 1998-12-22 |
| 5811567 | "Process for preparing the crystal modification of 2,2',2""-nitrilo triethyl tris(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2,2'-diyl)phosphite!" | Hans-Jerg Kleiner | 1998-09-22 |
| 5384346 | Polyvinyl butyrals having improved thermal stability and light resistance | Matthas Gutweiler, Ulrich M. Hutten, Hermann Schindler | 1995-01-24 |
| 5382613 | Light-stable polyphenylene ether molding composition with an antistatic finish | Klaus Bergner | 1995-01-17 |
| 5356967 | 6-aryl-6H-dibenzo[c,e][1,2]oxaphosphorine stabilizers for plastics | Manfred Bohshar, Hans-Jerg Kleiner | 1994-10-18 |
| 5331034 | Process for reducing the discoloration of a plastic molding composition at the processing temperature | Georg Schmailzl | 1994-07-19 |
| 5298541 | Aryl phosphonites, a process for their production and their use for stabilizing plastics | Manfred Bohshar, Hans-Jerg Kleiner | 1994-03-29 |
| 5281640 | Diarylphosphinous acid aryl esters, a process for their preparation and their use for stabilizing plastics | Dieter Regnat, Manfred Bohshar, Hans-Jerg Kleiner | 1994-01-25 |
| 5169925 | Polymeric polyalkyl-1-oxa-diazaspirodecanes | Georg Schmailzl, Gunther Nowy | 1992-12-08 |
| 5109043 | Process for the preparation of organophosphorus derivatives of 2,4-di-tert-butylphenol, of 4,4'-dihalomagnesium compounds of biphenyl and the use of the organophosphorus derivatives for the stabilization of polyolefin molding | Manfred Bohshar, Hans-Jerg Kleiner, Karl Waldmann | 1992-04-28 |
| 5107043 | Process for the preparation a bis(3,3-bis(4-hydroxyalkylphenyl)butanoic acid)diol ester | Georg Schmailzl, Josef Wiedemann, Gunther Nowy | 1992-04-21 |
| 4504661 | Polytriazinylamines, process for their preparation | Hartmut Wiezer | 1985-03-12 |
| 4496726 | Polytriazinyl alcohols, esters and urethanes, a process for their preparation | Hartmut Wiezer | 1985-01-29 |
| 4476302 | High-molecular esters and urethanes containing piperidine groups, a process for their preparation | Hartmut Wiezer | 1984-10-09 |
| 4471417 | Poly-bis-triazinylimides, their preparation | Hartmut Wiezer | 1984-09-11 |
| 4433145 | Triazine stabilizers | Hartmut Wiezer | 1984-02-21 |
| 4409348 | Poly-bis-triazinylaminotriazinylamines, their preparation and their use as light stabilizers for plastics, and plastics which have been stabilized with them | Hartmut Wiezer | 1983-10-11 |