Number | Name | Date | Kind |
---|---|---|---|
2494283 | Cassaday et al. | Oct 1950 | |
2725394 | Zenftman et al. | Nov 1955 | |
2951585 | Burks | Sep 1960 | |
2957931 | Hamilton et al. | Oct 1960 | |
2961457 | Pohlemann et al. | Nov 1960 | |
2969378 | Gleim et al. | Jan 1961 | |
2990420 | Gleim et al. | Jun 1961 | |
3014585 | Noblitt | Dec 1961 | |
3947542 | Charlot | Mar 1976 |
Number | Date | Country |
---|---|---|
892393 | Mar 1962 | GBX |
Entry |
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Hoechst Aktiengesellschaft "Preliminary Instruction Sheet Collector HOE F 1415 for the Flotation of Non-Sulphide Minerals" Jun. 1981, 6 pages. |
Hoechst Aktiengesellschaft "HOE F 2711", 2 pages, 10/77. |