Number | Date | Country | Kind |
---|---|---|---|
3708904 | Mar 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3865605 | Spietschka et al. | Feb 1975 | |
4107126 | Burke, Jr. et al. | Aug 1978 | |
4127420 | Harris et al. | Nov 1978 | |
4277288 | Lawrence et al. | Jul 1981 |
Entry |
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Derwent Abstract, An 84-072532/12, "Quinacridone Pigment Purification", Japanese Patent, J59027959, 2/14/84. |
Derwent Abstract, An 85-149026/25, "Mfg. Coloured Silica Gel Microspheres", Japanese Patent, J60081012, 5/9/85. |