Number | Name | Date | Kind |
---|---|---|---|
1617533 | Mahler | Feb 1927 | |
1685204 | Schreier | Sep 1928 | |
2543792 | Marasco et al. | Oct 1949 | |
2614029 | Moede | Feb 1951 | |
3294572 | Piccoine et al. | Dec 1966 | |
4026784 | Rivers | May 1977 | |
4040802 | Deitz et al. | Aug 1977 | |
4056261 | Darrah | Nov 1977 | |
4072479 | Sinha et al. | Feb 1978 | |
4075282 | Storp et al. | Feb 1978 | |
4111766 | Idota et al. | Sep 1978 | |
4131454 | Piret et al. | Dec 1978 | |
4166781 | Staples | Sep 1979 |
Number | Date | Country |
---|---|---|
43-8004065 | Oct 1968 | JPX |
Entry |
---|
Habashi, Fathi, Extractive Metallurgy, vol. 2, 1970, pp. 183-193. |