Number | Date | Country | Kind |
---|---|---|---|
4142765 | Dec 1991 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4069151 | Higley et al. | Jan 1978 | |
4563516 | Schreckenberg | Jan 1986 | |
4663399 | Peters | May 1987 | |
4935140 | Konstatin | Jun 1990 | |
5104723 | Freitag | Apr 1992 |
Number | Date | Country |
---|---|---|
0213465 | Mar 1987 | EPX |
Entry |
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Spatorico, J. of App. Polym. Sci. vol. 18, pp. 1793-1804 (1974). |
Journal of Membrane Science, 34 (1987) 185-198. |
O.G. Abstract of U.S. Pat. No. 4,252,922. |