Number | Date | Country | Kind |
---|---|---|---|
55-52185 | Apr 1980 | JPX | |
55-136646 | Sep 1980 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
4297280 | Hirai et al. | Oct 1981 |
Number | Date | Country |
---|---|---|
2947773 | Jun 1980 | DEX |
55-72177 | May 1980 | JPX |
2046729 | Nov 1980 | GBX |
Entry |
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Hirai et al., Chem. Abstracts, vol. 93, (1980), No. 204, 705 p. |