Number | Name | Date | Kind |
---|---|---|---|
1154602 | Best | Sep 1915 | |
1331334 | Field | Feb 1920 | |
2128311 | Mertes | Aug 1938 | |
2639975 | Muller et al. | May 1953 | |
3224873 | Swanson | Dec 1965 | |
3453072 | Vian-Ortuno et al. | Jul 1969 | |
3794719 | Lowenhaupt et al. | Feb 1974 |
Number | Date | Country |
---|---|---|
572,977 | Mar 1959 | CA |
Entry |
---|
C.I.M. Bulletin, Feb., 1975, pp. 105, 106, 113, (Ritcey et al.). |
Fletcher et al., "Napthenic Acid as a Liquid-Liquid Extraction Reagent for Metals" Inst. Mining & Metallurgy, England 1961, pp. 355, 365. |