C01B 25/465
The extracting agent being an ester or a mixture of esters
Official title: {the extracting agent being an ester or a mixture of esters}
C01B25/465 (The extracting agent being an ester or a mixture of esters) appears on 5 US grants and 0 published applications in this corpus.
Search patents in C01B- Granted patents
- 5
- Published applications
- 0
- Assignees
- 2
- Inventors
- 10
- Latest grant
- 9 Apr 1991
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for removing iron, chromium and vanadium from phosphoric acid9 Apr 1991US 5,006,319 AFMC Corporation
- Process for purifying phosphoric acid25 Oct 1988US 4,780,295 AFMC Corporation
- Purification of wet-process phosphoric acid6 Sep 1988US 4,769,226 ARhone-Poulenc Chimie de Base
- Method of purifying phosphoric acid19 Jul 1983US 4,394,361 AFMC Corporation
- Method of regenerating phosphoric acid extraction solvent19 Jan 1982US 4,311,681 AFMC Corporation
No published applications in this class yet.
Most cited
By later US patents
- Method of regenerating phosphoric acid extraction solvent5US 4,311,681 AFMC Corporation · 1982
- Method of purifying phosphoric acid5US 4,394,361 AFMC Corporation · 1983
- Purification of wet-process phosphoric acid2US 4,769,226 ARhone-Poulenc Chimie de Base · 1988
- Process for removing iron, chromium and vanadium from phosphoric acid2US 5,006,319 AFMC Corporation · 1991