Number | Date | Country | Kind |
---|---|---|---|
42 08 254.4 | Mar 1992 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3470182 | Hardtman et al. | Sep 1969 | |
4196207 | Webber | Apr 1980 | |
4770691 | Nezu et al. | Sep 1988 | |
4932999 | Saito et al. | Jun 1990 | |
4985066 | Wada et al. | Jan 1991 | |
5019151 | Wada et al. | May 1991 |
Number | Date | Country |
---|---|---|
0323757 | Jul 1989 | EPX |
0326328 | Aug 1989 | EPX |
0447891 | Sep 1991 | EPX |
0452002 | Oct 1991 | EPX |
0519211 | Dec 1992 | EPX |
WO9208704 | May 1992 | WOX |
WO9507278 | Mar 1995 | WOX |
Entry |
---|
Grant & Hackh's "Chemical Dictionary", 5th Edition, McGraw Hill Book Co, New York, N.Y. (1987). |
NSPTO Chemical Classification definition of Hetero Ring (Feb. 1985). |