C01B 32/378
Purification
C01B32/378 (Purification) appears on 33 US grants and 45 published applications in this corpus.
Search patents in C01B- Granted patents
- 33
- Published applications
- 45
- Assignees
- 34
- Inventors
- 138
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 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 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 1 | 3 |
| 2012 | 2 | 3 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 3 |
| 2021 | 1 | 4 |
| 2022 | 2 | 1 |
| 2023 | 3 | 6 |
| 2024 | 0 | 6 |
| 2025 | 6 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Alkylated cyclodextrin compositions and processes for preparing and using the same7 Jul 2026US 12,674,005 B2CyDex Pharmaceuticals, Inc.
- Porous carbon material composites and their production process, adsorbents, cosmetics, purification agents, and composite photocatalyst materials6 Jan 2026US 12,515,198 B2Sony Corporation
- Method for hydrolyzing cellulose into sugar to produce spherical capacitive carbon25 Nov 2025US 12,479,732 B2Guangxi Academy of Sciences
- System and method for separation of salts and carbon allotropes1 Jul 2025US 12,344,526 B2SkyNano LLC
- Nutrient recovery from hydrothermal liquefaction biochar18 Mar 2025US 12,252,404 B2Arizona Board of Regents on behalf of Arizona State University
- Composite polymer particles, porous carbon particles and method for independent control of particle diameter and pore size of porous carbon particles6 Aug 2026US 2026/0225896 A1
- Porous carbon and preparation method thereof28 May 2026US 2026/0145945 A1PetroChina Company Limited
- Method for making activated carbon material for supercapacitor12 Feb 2026US 2026/0042674 A1CPC Corporation, Taiwan
- System and method for separation of salts and carbon allotropes25 Sep 2025US 2025/0296841 A1SkyNano LLC
- System and method for separation of salts and carbon allotropes8 May 2025US 2025/0145465 A1SkyNano LLC
Most cited
By later US patents
- Low ash pelleted carbon and process of preparation54US 4,532,227 ATexaco Development Corporation · 1985
- Porous carbon support materials useful in chromatography and their preparation46US 4,225,463 AMerck Patent GmbH · 1980
- Use of activated carbon in waste water treating process26US 4,292,176 AStandard Oil Company (Indiana) · 1981
- Method of heat treating carbonaceous material to enhance its adsorption of taste-and-odor-causing and other organic compounds from water19US 7,202,195 B2The Penn State Research Foundation · 2007
- Alkylated cyclodextrin compositions and processes for preparing and using the same19US 9,493,582 B2CyDex Pharmaceuticals, Inc. · 2016