Number | Date | Country | Kind |
---|---|---|---|
4230903 | Sep 1992 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4509971 | Forster et al. | Apr 1985 | |
4784682 | Forster et al. | Nov 1988 | |
5234896 | Wagner et al. | Aug 1993 |
Number | Date | Country |
---|---|---|
444764 | Feb 1991 | EPX |
Entry |
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Chemical Abstracts, vol. 113, No. 3, Jul. 16, 1990, C. Paul Bianchi. |