| Number | Date | Country | Kind |
|---|---|---|---|
| 58-91215 | May 1983 | JPX | |
| 58-092944 | May 1983 | JPX | |
| 58-201835 | Oct 1983 | JPX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 3935208 | Altermatt | Jan 1976 | |
| 4214082 | Harms et al. | Jul 1980 | |
| 4355163 | von Oertzen et al. | Oct 1982 | |
| 4442288 | Meininger et al. | Apr 1984 |
| Entry |
|---|
| "Fundamentals of Chemistry and Application of Dyes", P. Rys and H. Zollinger, pp. 62-71, Wiley-Interscience Publishers, New York, (1972). |