Number | Date | Country | Kind |
---|---|---|---|
2636558 | Aug 1976 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2437797 | Walling | Mar 1948 | |
3153670 | Speziale et al. | Oct 1964 | |
3253036 | Crawford | May 1966 | |
3340333 | Baranauckas et al. | Sep 1967 | |
3366687 | Ellis et al. | Jan 1968 | |
3760001 | Staendeke | Sep 1973 |
Entry |
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Degering, An Outline of Organic Nitrogen Compounds, University Lithoprinters, Michigan, p. 213 (1945). |