Number | Date | Country | Kind |
---|---|---|---|
20340 A/89 | Apr 1989 | ITX |
Number | Name | Date | Kind |
---|---|---|---|
3041317 | Gibbs et al. | Jun 1962 | |
4834922 | Ezzell et al. | May 1989 |
Number | Date | Country |
---|---|---|
60-36454 | Feb 1985 | JPX |
Entry |
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Kirk-Othmer, Encyclopedia of Chem. Technology, pp. 414-417. |