Number | Date | Country | Kind |
---|---|---|---|
5933/76 | May 1976 | CHX |
Number | Name | Date | Kind |
---|---|---|---|
3684774 | Merten et al. | Aug 1972 | |
3809696 | Porret et al. | May 1974 | |
3946033 | Iwata et al. | Mar 1976 |
Entry |
---|
Sato, Chemical Abstracts, vol. 59 (1963), 3907e. |
Derwent Abstract 47300x/25 of Dutch Patent 75/13,582. |