Number | Date | Country | Kind |
---|---|---|---|
3431276 | Aug 1984 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2049828 | Stevens | Aug 1936 | |
2276986 | Kemp et al. | Mar 1942 | |
2330672 | Braak | Sep 1943 | |
3228877 | Mahon | Jan 1966 | |
3663402 | Christenson et al. | May 1972 | |
4529521 | Cortes et al. | Jul 1985 |
Number | Date | Country |
---|---|---|
1266098 | Apr 1968 | DEX |
Entry |
---|
Porter et al., "Membrane Ultrafiltration", from Chem. Tech., pp. 56-63, 1-1971. |