Number | Date | Country | Kind |
---|---|---|---|
3-228104 | Sep 1991 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4906707 | Yukimoto et al. | Mar 1990 |
Number | Date | Country |
---|---|---|
0116309 | Aug 1984 | EPX |
0322857 | Jul 1989 | EPX |
0397036 | Nov 1990 | EPX |
Entry |
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Chemical Patents Index, Documentation Abstracts Journal, Sect. Ch, Week 9144, Jan. 8, 1992, AN 91-325188/44 & WO-A-9 115 536, Oct. 1991, Abstract. |