Number | Name | Date | Kind |
---|---|---|---|
3014863 | Priest | Dec 1961 | |
3668122 | Branscum | Jun 1972 | |
4046197 | Gruesbeck et al. | Sep 1977 | |
4105578 | Finlayson et al. | Aug 1978 | |
4304677 | Stauffer et al. | Dec 1981 | |
4330414 | Hoover | May 1982 | |
4350601 | Mosier et al. | Sep 1982 |
Number | Date | Country |
---|---|---|
2000799 | Jan 1979 | GBX |
Entry |
---|
Natrosol, publication by Hercules, Inc., 1969, pp. 1-4 and 6-9. |