Number | Date | Country | Kind |
---|---|---|---|
2638232 | Aug 1976 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2974141 | Plue | Mar 1961 | |
3073820 | Plue | Jan 1963 | |
3770727 | Brack | Nov 1973 |
Number | Date | Country |
---|---|---|
2,036,505 | Jan 1972 | DEX |
Entry |
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Piozzo et al., Chem. Absts. 1967, vol. 67, No. 64295r. |
Tsukerman et al., Chem. Absts. 1969, vol. 71, No. 22060r. |
Gorbunova et al., Chem. Absts. 1971, vol. 74, No. 53631r. |
Zhungietu et al., Chem. Absts. 1973, vol. 78, No. 111271u. |