Number | Date | Country | Kind |
---|---|---|---|
3324802 | Jul 1983 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4401816 | Levitt | Aug 1983 | |
4515620 | Bohner | May 1985 |
Number | Date | Country |
---|---|---|
121788 | Sep 1966 | NLX |
2715786 | Oct 1977 | NLX |
Entry |
---|
Levitt, Chem. Abst. 92-76548e, equiv. EP 1485. |