Number | Name | Date | Kind |
---|---|---|---|
1229919 | Ebrill et al. | Jun 1917 | |
2361057 | Ratzer | Oct 1944 | |
2368919 | Fritzberg | Feb 1945 | |
2519606 | Sharp | Aug 1950 | |
2562646 | Sharp et al. | Jul 1951 | |
2793185 | Albrektsson et al. | May 1957 | |
3179252 | Vrablik | Apr 1965 | |
3313795 | Rubin | Apr 1967 | |
3314880 | Rubin | Apr 1967 | |
3838143 | Grant | Sep 1974 |
Number | Date | Country |
---|---|---|
1,098,716 | Jan 1968 | UK |
Entry |
---|
Chem. Abstracts, vol. 64, 1966, 7286d-e, Purac. |
Chem. Abstracts, vol. 65, 1966, 1953b, Purac. |