C01B 17/925
By processes involving a liquid-liquid extraction
Official title: {by processes involving a liquid-liquid extraction}
C01B17/925 (By processes involving a liquid-liquid extraction) appears on 4 US grants and 0 published applications in this corpus.
Search patents in C01B- Granted patents
- 4
- Published applications
- 0
- Assignees
- 3
- Inventors
- 7
- Latest grant
- 4 Jul 2000
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for removing organic phosphorous compounds and other impurities from dilute sulfuric acid4 Jul 2000US 6,083,470 AHoechst Aktiengesellschaft
- Extraction method28 Dec 1999US 6,007,722 AChematur Ecoplanning Oy
- Method of separation of sugars and concentrated sulfuric acid26 Aug 1986US 4,608,245 A
- Process for the recovery of sulfuric acid3 Apr 1984US 4,440,734 AGouvernement du Quebec
No published applications in this class yet.
Most cited
By later US patents