Number | Date | Country | Kind |
---|---|---|---|
50-17480 | Feb 1975 | JA |
Number | Name | Date | Kind |
---|---|---|---|
2190918 | Goethel et al. | Feb 1940 | |
3657132 | Gourlaouen et al. | Apr 1972 | |
3804743 | Mills et al. | Apr 1974 | |
3925220 | Mills | Dec 1975 |
Entry |
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Bruins "Plasticizer Technology", vol. 1, 1965, pp. 79-80. |