Number | Name | Date | Kind |
---|---|---|---|
3580939 | Ceyzeriat | May 1971 | |
3608000 | Anderson | Sep 1971 | |
3634560 | Anderson | Jan 1972 | |
4046533 | Olund | Sep 1977 | |
4237172 | Packo | Dec 1980 | |
4304805 | Packo | Dec 1981 |
Entry |
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Kirk-Othmer, "Encyclopedia of Chemical Technology", 2nd edition, vol. 17, pp. 295-308, and vol. 6, pp. 471-481, .COPYRGT.1965. |