Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6949677 | Acetoacetylated N-phenyl-p-phenylenediamines | Paul Hanselmann | 2005-09-27 |
| 6734324 | Method for producing acetoacetylated aromatic amines | Paul Hanselmann | 2004-05-11 |
| 6689918 | Method for producing dicarbonyl compounds | Paul Hanselmann | 2004-02-10 |