| Number | Date | Country | Kind |
|---|---|---|---|
| 6-271318 | Nov 1994 | JPX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4418015 | Schreiner et al. | Nov 1983 | |
| 5066796 | Law | Nov 1991 | |
| 5453501 | Jager | Sep 1995 |
| Number | Date | Country |
|---|---|---|
| A0001451 | Apr 1979 | EPX |
| A0471456 | Feb 1992 | EPX |
| A2200364 | Aug 1988 | GBX |
| Entry |
|---|
| Chemical Abstracts, vol. 69, Nov. 22, No. 25, 1968. |