Number | Date | Country | Kind |
---|---|---|---|
2219216 | Apr 1972 | DT |
Number | Name | Date | Kind |
---|---|---|---|
3417146 | Linn et al. | Dec 1968 |
Number | Date | Country |
---|---|---|
46,428 | Oct 1962 | PO |
52,206 | Jan 1967 | PO |
Entry |
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Simons et al., Jacs 63, pp. 608-609, (1941). |
Dokunichin et al., Z. vses. Chim. Obsc. 11,35 (1966) (cited by applicant). |