Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4612369 | Disazo 4,4'-diaminostilbene-2,2'-disulfonic acids dye | — | 1986-09-16 |
| 4558121 | Sulfoethylaminosulfonyl substituted disazo dyes | Arthur Buhler | 1985-12-10 |
| 4248773 | Acetoacetamide diazo dyestuffs | Rudolf Hurter | 1981-02-03 |
| 4193916 | Sulfo- or carboxy-aryl amino sulfonyl phenyl azo hydroxpyridine heavy metal complex dyes | Gerhard Back | 1980-03-18 |