Number | Date | Country | Kind |
---|---|---|---|
2928554 | Jul 1979 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2802882 | Bader et al. | Aug 1957 | |
2839587 | Raum | Jun 1958 |
Number | Date | Country |
---|---|---|
558987 | Jan 1944 | GBX |
Entry |
---|
The Merck Index, 9th Ed., 1976, pp. 778 and 779. |
U.S.S.R. Journal Plast. Massy, 1971, (6), pp. 11-13. |