Number | Date | Country | Kind |
---|---|---|---|
2943551 | Oct 1979 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
2409712 | Schweitzer | Oct 1946 | |
2806051 | Brockway | Sep 1957 | |
3627813 | Abbate et al. | Dec 1971 | |
4178455 | Hirai et al. | Dec 1979 | |
4388238 | Heitkamper et al. | Jun 1983 |
Entry |
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Adams et al., Chemical Reviews (1965) vol. 65, 567-572. |