Number | Name | Date | Kind |
---|---|---|---|
2200486 | Burdick | May 1940 | |
2937940 | Weisberg et al. | May 1960 | |
3102808 | Weisberg et al. | Sep 1963 | |
3163524 | Weisberg et al. | Dec 1964 | |
3351556 | Tsourmas | Nov 1967 | |
3958984 | Fountain | May 1976 |
Entry |
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Hackh's Chemical Dictionary, McGraw-Hill Book Co., 4 Ed., pp. 3-4, 24-25, 160-161, 376-377, 676, 677. |