Number | Date | Country | Kind |
---|---|---|---|
91 08764 | Jul 1991 | FRX |
Number | Name | Date | Kind |
---|---|---|---|
3382248 | Anthony et al. | May 1968 | |
3637697 | Anthony et al. | Jan 1972 | |
4820512 | Grollier | Apr 1989 | |
4973474 | Hocquaux et al. | Nov 1990 | |
5132106 | Tuloup et al. | Jul 1992 |
Number | Date | Country |
---|---|---|
356271 | Jul 1989 | EPX |
1695959 | Oct 1966 | DEX |
Entry |
---|
Chemical Abstracts, vol. 92, 1980, p. 696. |