Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6274749 | High-temperature resistant sulfonated aromatic polyether ketone cation exchangers and sulfonated poly (phenylene sulfide) cation exchangers as catalysts at reaction temperature above 150.degree. C | Werner Sievers, Harald Bönsel, Wolfgang Bauer, Joachim Semel | 2001-08-14 |