Number | Date | Country | Kind |
---|---|---|---|
3935798 | Oct 1989 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
4132569 | DePablo et al. | Jan 1979 | |
4642134 | Van Antwerp et al. | Feb 1987 |
Number | Date | Country |
---|---|---|
51-68498 | Jun 1976 | JPX |
63-243232 | Oct 1988 | JPX |
Entry |
---|
Patent Abstracts of Japan, vol. 13 No. 145 of JP-A 63 307 103-Apr. 10, 1989. |
Chemical Abstracts, vol. 94 No. 184680s Jun. 1981. |
Chemical Abstracts vol. 104, No. 189243m Jun. 1986. |