Number | Name | Date | Kind |
---|---|---|---|
3425971 | Gugliemeill et al. | Feb 1969 | |
4002819 | Woytiuk | Jan 1977 | |
4176240 | Sabia | Nov 1979 | |
4802732 | Kufuma et al. | Feb 1989 | |
4946237 | Arroyo et al. | Aug 1990 | |
5020875 | Arroyo et al. | Jun 1991 | |
5138685 | Arroyo et al. | Aug 1992 |
Entry |
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Djock, et al., "Review of Synthetic and Starch-Graft Copolymer Superabsorbents," Absorbents Products Conf., Nov. 16-17, 1983. |