Number | Name | Date | Kind |
---|---|---|---|
3577553 | Ferlauto | May 1971 | |
3624214 | Stevenson | Nov 1971 | |
3769432 | Tomcufcik | Oct 1973 |
Entry |
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German Offenlegungsschrift 2,104,346 (1972) Hoechst. |
German Offenlegungsschrift 2,104,347 (1972) Hoechst. |
Science, vol. 168 pp. 373-374 (1970). |