| Number | Name | Date | Kind |
|---|---|---|---|
| 3769386 | Rundell et al. | Oct 1973 | |
| 4310440 | Wilson et al. | Jan 1982 | |
| 4388285 | Rankel et al. | Jun 1983 | |
| 4420467 | Whittam | Dec 1983 | |
| 4440871 | Lok et al. | Apr 1984 | |
| 4456582 | Marosi et al. | Jun 1984 | |
| 4486397 | Eshraghi et al. | Dec 1984 | |
| 4500651 | Lok et al. | Feb 1985 | |
| 4567029 | Wilson et al. | Jan 1986 |
| Number | Date | Country |
|---|---|---|
| 0054364 | Jun 1982 | EPX |
| 0055046 | Jun 1982 | EPX |
| 0055529 | Jul 1982 | EPX |
| 0059059 | Sep 1982 | EPX |
| 0984502 | Feb 1965 | GBX |
| Entry |
|---|
| Schmitz-Dumont, "Zeitschrift fur Anorganische und Allgemeine CHEMIE", 302, Nov. 1959, pp. 121-135. |