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4183906 | Watson et al. | Jan 1980 | |
4235858 | Blakey et al. | Nov 1980 | |
4867918 | Kiyonaga et al. | Sep 1989 | |
4908471 | Leuck et al. | Mar 1990 | |
4931225 | Cheng | Jun 1990 | |
5061406 | Cheng | Oct 1991 | |
5108662 | Litz et al. | Apr 1992 | |
5167935 | Lerner | Dec 1992 | |
5302325 | Cheng | Apr 1994 | |
5356600 | Kiyoaga et al. | Oct 1994 | |
5985230 | Vlaming et al. | Nov 1999 |
Number | Date | Country |
---|---|---|
0799794A1 | Oct 1997 | EPX |
0808797A2 | Nov 1997 | EPX |
0808797A3 | Feb 1998 | EPX |
803211 | Oct 1958 | GBX |
Entry |
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E. Faried, et al, "Boosting Existing Nitric Acid Production", The Fertiliser Society, Oct. 16, 1986. |
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