Number | Name | Date | Kind |
---|---|---|---|
2798118 | Bernstein et al. | Apr 1957 | |
2841600 | Hogg et al. | Jul 1958 |
Number | Date | Country |
---|---|---|
996,080 | Jun 1965 | UK |
1,227,992 | Apr 1971 | UK |
Entry |
---|
Chem. Abstracts vol. 68, 1968 pars. 69,177j, relied on. |
Merck Index (1960) p. 462, relied on. |