Number | Date | Country | Kind |
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2510525 | Mar 1975 | DT |
Number | Name | Date | Kind |
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2493318 | Shonle et al. | Jan 1950 | |
2493319 | Shonle et al. | Jan 1950 | |
3755325 | Clark et al. | Aug 1973 | |
3853907 | Edwards | Dec 1974 |
Number | Date | Country |
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43-12354 | May 1968 | JA |
Entry |
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Shepard et al. J. Amer. Chem. Soc. 1947, vol. 69, pp. 2269-2270. |