Number | Date | Country | Kind |
---|---|---|---|
54/139328 | Oct 1979 | JPX | |
54/148882 | Nov 1979 | JPX |
Number | Name | Date | Kind |
---|---|---|---|
2466509 | Sun | Apr 1949 | |
4141741 | Lucas et al. | Feb 1979 |
Number | Date | Country |
---|---|---|
570108 | Feb 1959 | CAX |
44442 | Jun 1961 | PLX |
Entry |
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Baldwin, C. M., "Preparation and Properties of Water-Free Vitreous Beryllium Fluoride", Journal Non-Crystalline Solids, 31, (1979), pp. 441-445. |