Number | Name | Date | Kind |
---|---|---|---|
2521101 | Thor | Sep 1950 | |
3528822 | Borenstein | Sep 1970 | |
3873740 | Terrell | Mar 1975 |
Number | Date | Country |
---|---|---|
918,399 | Feb 1963 | UK |
4,642,578 | Jan 1971 | JA |
Entry |
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Hackh's Chemical Dictionary - 4th Ed. Grant, McGraw-Hill, 9/74, N.Y., p. 95. |