Number | Date | Country | Kind |
---|---|---|---|
50/153706 | Dec 1975 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
3417085 | Kuch et al. | Dec 1968 | |
3502666 | Kuch et al. | Mar 1970 | |
3586675 | Ritchie et al. | Jun 1971 |
Entry |
---|
Chemical Abstracts, vol. 68, entry 21941(b) 1968. |
Chemical Abstracts, vol. 70, entry 87829(u) 1969. |