C01B 7/0725
By active carbon
Official title: {by active carbon}
C01B7/0725 (By active carbon) appears on 26 US grants and 20 published applications in this corpus.
Search patents in C01B- Granted patents
- 26
- Published applications
- 20
- Assignees
- 15
- Inventors
- 48
- Latest grant
- 7 Apr 2020
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 7 |
| 2004 | 7 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 3 |
| 2009 | 0 | 1 |
| 2010 | 3 | 1 |
| 2011 | 0 | 0 |
| 2012 | 2 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 1 | 1 |
| 2018 | 0 | 2 |
| 2019 | 1 | 1 |
| 2020 | 2 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Hydrogen gas recovery system and hydrogen gas separation and recovery method7 Apr 2020US 10,611,635 B2Shin-Etsu Chemical Co., Ltd.
- Hydrochloric acid purification process and plant3 Mar 2020US 10,576,417 B2Arkema France
- Method for purifying contaminated gaseous hydrogen chloride15 Jan 2019US 10,179,735 B2Wacker Chemie AG
- Hydrochloric acid purification process28 Nov 2017US 9,828,314 B2Arkema France
- Method of reusing hydrogen25 Mar 2014US 8,679,228 B2Tokuyama Corporation
- Process for purifying hydrogen halide solutions containing organic impurities21 Aug 2025US 2025/0263296 A1
- Hydrochloric acid purification process and plant9 May 2019US 2019/0134560 A1Arkema France
- Hydrogen gas recovery system and hydrogen gas separation and recovery method23 Aug 2018US 2018/0237298 A1Shin-Etsu Chemical Co., Ltd.
- Method for purifying contaminated gaseous hydrogen chloride18 Jan 2018US 2018/0016141 A1Wacker Chemie AG
- Hydrochloric acid purification process8 Jun 2017US 2017/0158586 A1Arkema France
Most cited
By later US patents
- Method and apparatus for removing trace impurities from a gas using superactivated carbon material15US 6,425,946 B1Matheson Tri-Gas, Inc. · 2002
- Method and materials for purifying reactive gases using preconditioned ultra-low emission carbon material12US 6,547,861 B2Matheson Tri-Gas, Inc. · 2003
- Method for removing impurities from process gas stream7US 6,797,036 B2Matheson Tri-Gas, Inc. · 2004
- Method of purifying hydrogen chloride gas5US 4,018,880 ARhone-Progil · 1977
- Purification of hydrochloric acid with ferric chloride pretreated activated carbon5US 5,202,106 ASolvay SA · 1993