Number | Name | Date | Kind |
---|---|---|---|
2309173 | Diehl | Jan 1943 | |
2811463 | Burgyan | Oct 1957 | |
3528839 | Weber | Sep 1970 | |
3561989 | Weber | Feb 1971 | |
4075029 | Nuss | Feb 1978 |
Entry |
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"Classification and Chemical Descriptions of Mixed Metal Oxide Inorganic Colored Pigments", The Dry Color Manufacturer's Association, Arlington, Va., pp. 7 & 18. |