Number | Name | Date | Kind |
---|---|---|---|
3929630 | Smith | Oct 1975 |
Number | Date | Country |
---|---|---|
8207944 | Dec 1983 | JPX |
2238880 | Sep 1990 | JPX |
2252669 | Oct 1990 | JPX |
3049678 | Mar 1991 | JPX |
3087183 | Apr 1991 | JPX |
3172168 | Jul 1991 | JPX |
3505163 | Nov 1991 | JPX |
Entry |
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Groffman, et al: "Removing Lead from Watewater Using Zeolites," in Water Environment & Technology, May 1992, p. 54. |
Schwartz, et al: "The Use of Fluid Catalytic Cracking Catalyst in Activated Sludge Wastewater Treatment," in Journal WPCF, vol. 48, No. 2, pp. 274-280 (Feb. 1976). |
Krause, M., New Glass, 1990, 5(2), 209-16). |
Menke and Rehm (Applied Microbiology Biotechnology, 1992, 37:655-661). |
Forster, H., et al in Fortschr. Mineral., Beih., 63(2), 1-24. |