C01B 7/07
Purification
Official title: Purification {; Separation (C01B7/015 takes precedence)}
C01B7/07 (Purification) appears on 305 US grants and 245 published applications in this corpus.
Search patents in C01B- Granted patents
- 305
- Published applications
- 245
- Assignees
- 196
- Inventors
- 815
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 6 | 0 |
| 1978 | 5 | 0 |
| 1979 | 5 | 0 |
| 1980 | 9 | 0 |
| 1981 | 7 | 0 |
| 1982 | 3 | 0 |
| 1983 | 5 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 7 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 4 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 7 | 0 |
| 1998 | 16 | 0 |
| 1999 | 5 | 0 |
| 2000 | 6 | 0 |
| 2001 | 9 | 4 |
| 2002 | 10 | 12 |
| 2003 | 4 | 15 |
| 2004 | 9 | 9 |
| 2005 | 5 | 1 |
| 2006 | 4 | 5 |
| 2007 | 3 | 20 |
| 2008 | 3 | 14 |
| 2009 | 4 | 10 |
| 2010 | 9 | 15 |
| 2011 | 6 | 21 |
| 2012 | 9 | 15 |
| 2013 | 11 | 9 |
| 2014 | 11 | 11 |
| 2015 | 2 | 9 |
| 2016 | 5 | 11 |
| 2017 | 6 | 7 |
| 2018 | 8 | 14 |
| 2019 | 13 | 12 |
| 2020 | 12 | 6 |
| 2021 | 4 | 6 |
| 2022 | 5 | 6 |
| 2023 | 2 | 2 |
| 2024 | 1 | 5 |
| 2025 | 4 | 4 |
| 2026 | 2 | 2 |
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
- Hydrogen chloride loop fuel reaction28 Oct 2025US 12,454,456 B2
- Hydrogen chloride dehydration method2 Sep 2025US 12,404,172 B2Tokuyama Corporation
- Apparatus and method for rapid cooling of high temperature gas12 Aug 2025US 12,383,857 B2Wanhua Chemical Group Co., Ltd.
- Process system for surface treatment, recycling equipment for waste liquid and method for recycling waste liquid2 Jul 2026US 2026/0183715 A1Industrial Technology Research Institute
- Method for preparing metallic magnesium and industrial silicon by decomposing serpentine with hydrochloric acid12 Mar 2026US 2026/0071343 A1Toli County Zhongda Magnesium Industry Co., Ltd
- Method for producing high-purity hydrochloric acid30 Oct 2025US 2025/0333304 A1Tokuyama Corporation
- Process for purifying hydrogen halide solutions containing organic impurities21 Aug 2025US 2025/0263296 A1
- Sugar mixtures and methods for production and use thereof17 Apr 2025US 2025/0122467 A1International N&H Denmark Aps
Most cited
By later US patents
- Integrated process to produce 2,3,3,3-tetrafluoropropene101US 8,058,486 B2Honeywell International Inc. · 2011
- Membrane solvent extraction82US 3,956,112 AAllied Chemical Corporation · 1976
- Treatment of fluids with electromagnetic radiation54US 5,832,361 A1998
- 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
- Process for purification of anhydrous hydrogen chloride gas45US 6,719,957 B2Bayer Aktiengesellschaft · 2004