Number | Date | Country | Kind |
---|---|---|---|
2526516 | Jun 1975 | DT | |
2608024 | Feb 1976 | DT |
Number | Name | Date | Kind |
---|---|---|---|
2127770 | Franz et al. | Aug 1938 | |
2310074 | Gotte | Feb 1943 |
Number | Date | Country |
---|---|---|
595,173 | Apr 1934 | DD |
341,053 | Jan 1931 | UK |
Entry |
---|
E. N. Abrahart, "Dyes and Dyeing" in Encyclopedia Brittanica, p. 1099. |
C. H. Giles, "Dyestuffs and Pigments" in Encyclopedia Brittanica, p. 1105. |
Hackh's Chemical Dictionary, Fourth Edition, (McGraw-Hill, 1972), p. 522. |