Number | Date | Country | Kind |
---|---|---|---|
4014429 | May 1990 | DEX |
Filing Document | Filing Date | Country | Kind | 102e Date | 371c Date |
---|---|---|---|---|---|
PCT/EP91/00842 | 5/3/1991 | 11/3/1992 | 11/3/1992 |
Publishing Document | Publishing Date | Country | Kind |
---|---|---|---|
WO91/17117 | 11/14/1991 |
Number | Name | Date | Kind |
---|---|---|---|
3423300 | Joo et al. | Jan 1969 | |
3450623 | Joo et al. | Jun 1969 | |
3595765 | Joo et al. | Jul 1971 | |
3761369 | Tirrell | Sep 1973 | |
3909381 | Ehrsam | Sep 1975 | |
4031001 | Bosa | Jun 1977 | |
4557811 | Furst et al. | Dec 1985 |
Number | Date | Country |
---|---|---|
583202 | Dec 1977 | SUX |
757607 | Aug 1980 | SUX |
Entry |
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Chemical Abstracts, Band 84, No. 10, Mar. 8, 1976, p. 513, Zusammenfassung Nr. 66896n, E. S. Letskikh et al.: "Electrochemical regeneration of chromium sulfate waste during oxidation (purification) of mineral was", & Khim. Tverd. Topl, 1976. |
Chemical Abstracts, Band 87, No. 26, Dec. 26, 1977, p. 450, Zusammenfassung Nr. 208652t; & SU-A-574 482 (E. S. Letskikh et al.), Sep. 30, 1977. |