Number | Date | Country | Kind |
---|---|---|---|
55-162212 | Nov 1980 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2894898 | Oettinger | Jul 1959 | |
3020229 | Thompson | Feb 1962 | |
3020230 | Smith | Feb 1962 | |
3194758 | Lissant | Jul 1965 | |
3436199 | Silvernail | Apr 1969 | |
3798160 | Huffman | Mar 1974 | |
4009103 | Burke | Feb 1977 | |
4291004 | McCaffrey | Sep 1981 |
Number | Date | Country |
---|---|---|
47-2429 | Jan 1972 | JPX |
443682 | Sep 1975 | SUX |
596545 | Mar 1978 | SUX |
Entry |
---|
"Alum Recovery for Filtration Plant, Water and Wastes Engineering", Fulton, pp. 78-81. |