Number | Date | Country | Kind |
---|---|---|---|
87 09870 | Jul 1987 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
2554219 | Simons et al. | May 1951 | |
3456024 | Loree | Jul 1969 |
Number | Date | Country |
---|---|---|
512068 | Feb 1968 | FRX |
Entry |
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Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 9, 2nd Ed. |