C01B 7/0731
By extraction
Official title: {by extraction}
C01B7/0731 (By extraction) appears on 59 US grants and 55 published applications in this corpus.
Search patents in C01B- Granted patents
- 59
- Published applications
- 55
- Assignees
- 49
- Inventors
- 176
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 6 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 2 | 3 |
| 2003 | 0 | 3 |
| 2004 | 1 | 1 |
| 2005 | 1 | 1 |
| 2006 | 1 | 1 |
| 2007 | 0 | 2 |
| 2008 | 0 | 0 |
| 2009 | 2 | 3 |
| 2010 | 3 | 2 |
| 2011 | 0 | 5 |
| 2012 | 2 | 3 |
| 2013 | 1 | 3 |
| 2014 | 0 | 1 |
| 2015 | 1 | 4 |
| 2016 | 1 | 5 |
| 2017 | 0 | 1 |
| 2018 | 2 | 3 |
| 2019 | 7 | 2 |
| 2020 | 2 | 2 |
| 2021 | 0 | 3 |
| 2022 | 3 | 2 |
| 2023 | 1 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 2 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for the separation of phosphorus pentafluoride from hydrogen chloride11 Aug 2026US 12,702,948 B2Mexichem Fluor S.A. De C.V.
- Method of separating phosgene and hydrogen chloride23 Jun 2026US 12,662,376 B2BASF SE
- Production method for high-purity hydrogen chloride gas27 May 2025US 12,312,247 B2Tokuyama Corporation
- HCL recovery unit31 Oct 2023US 11,802,046 B2Sgl Carbon SE
- Method of purifying waste hydrochloric acid18 Oct 2022US 11,472,702 B2LG Chem.Ltd.
- Sugar mixtures and methods for production and use thereof17 Apr 2025US 2025/0122467 A1International N&H Denmark Aps
- Method for the separation of phosphorus pentafluoride from hydrogen chloride27 Feb 2025US 2025/0065259 A1Mexichem Fluor S.A. De C.V.
- Method of separating phosgene and hydrogen chloride12 Sep 2024US 2024/0300817 A1BASF SE
- Pyrolytic extraction of hydrochloric acid from magnesium salt mixtures, especially bitterns4 Jan 2024US 2024/0002227 A1Luna Innovations Incorporated
- Production method for high-purity hydrogen chloride gas29 Dec 2022US 2022/0411265 A1Tokuyama Corporation
Most cited
By later US patents
- Membrane solvent extraction82US 3,956,112 AAllied Chemical Corporation · 1976
- Process for separating and recovering concentrated hydrochloric acid from the crude product obtained from the acid hydrolysis of cellulose49US 4,237,110 AThe Dow Chemical Company · 1980
- Separation of a substance mixture consisting of hydrogen chloride and phosgene38US 7,584,629 B2BASF SE · 2009
- Sugar mixtures and methods for production and use thereof33US 9,410,216 B2Virdia, Inc. · 2016
- Point-of-use ammonia purification for electronic component manufacture28US 5,496,778 AStartec Ventures, Inc. · 1996