Number | Date | Country | Kind |
---|---|---|---|
197 12 629 | Mar 1997 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3402192 | Hulaska | Sep 1968 | |
5306737 | Burkhart et al. | Apr 1994 | |
5357018 | Burkhart et al. | Oct 1994 | |
5789454 | McVey | Aug 1998 |
Entry |
---|
Hack's Chemical Dictionary, Fourth Edition, 1969, p. 118. |