Number | Name | Date | Kind |
---|---|---|---|
907387 | Merrill | Jul 1905 | |
1456563 | Noriega | May 1923 | |
1959212 | Miller | May 1934 | |
2025412 | Handy | Dec 1935 | |
2074085 | Frantz | Mar 1967 | |
2729330 | Newirth | Jan 1956 | |
2829735 | Kroll | Apr 1958 | |
2854136 | Gillie | Sep 1958 | |
2967617 | Evans | Jan 1961 | |
3310242 | Perkins | Mar 1967 |
Number | Date | Country |
---|---|---|
914,207 | Nov 1958 | UK |
Entry |
---|
Friend, Kitchener, "The Separation of Minerals from Mixtures by Selective Flocculation, Filtration & Separation", Feb. 1972, 25-28. |