C01B 33/158
Purification
Official title: Purification; Drying; Dehydrating
C01B33/158 (Purification) appears on 324 US grants and 404 published applications in this corpus.
Search patents in C01B- Granted patents
- 324
- Published applications
- 404
- Assignees
- 194
- Inventors
- 716
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 3 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 9 | 0 |
| 1999 | 3 | 0 |
| 2000 | 7 | 0 |
| 2001 | 3 | 0 |
| 2002 | 5 | 2 |
| 2003 | 6 | 5 |
| 2004 | 5 | 4 |
| 2005 | 0 | 6 |
| 2006 | 3 | 6 |
| 2007 | 1 | 4 |
| 2008 | 4 | 4 |
| 2009 | 1 | 4 |
| 2010 | 2 | 5 |
| 2011 | 4 | 5 |
| 2012 | 2 | 8 |
| 2013 | 3 | 7 |
| 2014 | 9 | 6 |
| 2015 | 4 | 7 |
| 2016 | 4 | 10 |
| 2017 | 7 | 12 |
| 2018 | 10 | 57 |
| 2019 | 28 | 32 |
| 2020 | 33 | 30 |
| 2021 | 23 | 35 |
| 2022 | 21 | 27 |
| 2023 | 29 | 34 |
| 2024 | 30 | 32 |
| 2025 | 19 | 34 |
| 2026 | 18 | 28 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Heat resistant aerogel materials15 Sep 2026US 12,735,554 B2Aspen Aerogels, Inc.
- Silica wet gel and aerogel1 Sep 2026US 12,722,355 B2Cardinal CG Company
- Aerogel blanket1 Sep 2026US 12,722,979 B2LG Chem.Ltd.
- Silica sol, silica aerogel blanket manufactured using same, and method for manufacturing same28 Jul 2026US 12,692,168 B2LG Chem.Ltd.
- Microporous aerogel21 Jul 2026US 12,685,995 B2Commonwealth Scientific and Industrial Research Organisation
- Method for preparing silica aerogel blanket17 Sep 2026US 2026/0274689 A1LG Chem.Ltd.
- Aerogel compositions and methods17 Sep 2026US 2026/0274690 A1Aspen Aerogels, Inc.
- Method and apparatus for manufacturing silica aerogel blanket10 Sep 2026US 2026/0265068 A1LG Chem.Ltd.
- Porous body, adsorbent including the porous body, and method of removing metal and/or metal ion with the adsorbent20 Aug 2026US 2026/0241370 A1Mitsui Mining & Smelting Co., Ltd.
- Porous water-splitting electrode based on support coated with carbon nanonube assembly, method for manufacturing same, and water electrolysis device including same13 Aug 2026US 2026/0234815 A1Korea University Research and Business Foundation
Most cited
By later US patents
- Rapid aerogel production process158US 6,670,402 B1Aspen Aerogels, Inc. · 2003
- Method for producing metal oxide aerogels having densities less than 0.02 g/cc134US 5,275,796 AThe Regents of the University of California · 1994
- Aerogel matrix composites114US 5,306,555 ABattelle Memorial Institute · 1994
- Process for forming transparent aerogel insulating arrays97US 4,610,863 AThe United States of America as represented by the United States Department of Energy · 1986
- Production of silica aerogels95US 4,954,327 A1990