Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE35359 | Amine salts of azo pigments based on pyrazolone derivatives | Stefan Hari | 1996-10-22 |
| 5151505 | Amine salts of azo pigments based on pyrazolone derivatives | Stefan Hari | 1992-09-29 |
| 5066695 | High-molecular weight organic material containing a metal complex pigment basaed on hydrazone | Paul Lienhard, Walter Wiedemann | 1991-11-19 |
| 4992495 | Process for coloring high-molecular weight organic material using amine salts of azo pigments based on pyrazolone derivatives | Stefan Hari | 1991-02-12 |
| 4775747 | Copper or nickel complexes of ligands containing an azomethine, semicarbozone or hydrazone moiety | Paul Lienhard | 1988-10-04 |
| 4670486 | Polymer composition pigmented with copper or nickel complexes of ligands containing a semicarbazone moiety | Paul Lienhard | 1987-06-02 |
| 4639477 | Process for coloring high-molecular organic material, and novel metal complexes of oxime(s) of o-hydroxy benzaldehyde(s) and ketone(s) | Paul Lienhard | 1987-01-27 |
| 4473500 | Monoazo pigments derived from aminophthalimides and substituted acetoacetarylides or 2-hydroxy-3-naphthoylarylides | Stefan Hari | 1984-09-25 |
| 4220586 | Hetero-aryl azo acylamino substituted aceto-acetarylide pigments | Armand Roueche, Stefan Hari | 1980-09-02 |