Number | Date | Country | Kind |
---|---|---|---|
3740471 | Nov 1987 | DEX |
Number | Name | Date | Kind |
---|---|---|---|
3652761 | Weetall | Mar 1972 | |
4219335 | Ebersole | Aug 1980 | |
4312834 | Vogel et al. | Jan 1982 | |
4560504 | Arnold | Dec 1985 | |
4657739 | Yasuda et al. | Apr 1987 | |
4820489 | Rothe et al. | Apr 1989 | |
4916056 | Brown, III et al. | Apr 1990 | |
5002884 | Kobayashi et al. | Mar 1991 |
Number | Date | Country |
---|---|---|
0016387 | Oct 1980 | EPX |
0133895 | Mar 1985 | EPX |
0200381 | Nov 1986 | EPX |
3343695 | Jun 1984 | DEX |
1420916 | Jan 1976 | GBX |
Entry |
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The Condensed Chemical Dictionary, p. 322, .COPYRGT.1981 Defn. of "Diatomaceous earth". |