Number | Name | Date | Kind |
---|---|---|---|
2099360 | Yonemura et al. | Nov 1937 | |
2120840 | McCullough | Jun 1938 | |
2398425 | Haff | Apr 1946 | |
3063805 | Gilchrist | Nov 1962 | |
3890425 | Stevens et al. | Jun 1975 | |
3890426 | Stevens et al. | Jun 1975 |
Entry |
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Nachrod et al., Ed., "Ion Exchange Technology" Academic Press, Inc., N. Y., 1956, pp. 12-14. |