Number | Name | Date | Kind |
---|---|---|---|
3290310 | Morfeta | Dec 1966 | |
3703563 | Lipowski et al. | Nov 1972 | |
4566986 | Waldmann | Jan 1986 | |
4765867 | Dreisbach | Aug 1988 | |
4891422 | Waldmann | Jan 1990 | |
4902779 | Waldmann | Feb 1990 | |
4923566 | Shawki | May 1990 | |
4997523 | Pease et al. | Mar 1991 |
Entry |
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Gard "Some Practical Aspects of Chelation in Papermaking" TAPPI, vol. 47, No. 1 Jan. 1964. |