C01B 33/152
Preparation of hydrogels
C01B33/152 (Preparation of hydrogels) appears on 112 US grants and 108 published applications in this corpus.
Search patents in C01B- Granted patents
- 112
- Published applications
- 108
- Assignees
- 96
- Inventors
- 311
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 4 | 0 |
| 1996 | 1 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 1 |
| 2002 | 2 | 0 |
| 2003 | 1 | 2 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 1 | 2 |
| 2007 | 1 | 2 |
| 2008 | 1 | 0 |
| 2009 | 2 | 4 |
| 2010 | 0 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 3 |
| 2014 | 0 | 3 |
| 2015 | 2 | 4 |
| 2016 | 1 | 1 |
| 2017 | 1 | 3 |
| 2018 | 5 | 13 |
| 2019 | 7 | 10 |
| 2020 | 7 | 4 |
| 2021 | 3 | 8 |
| 2022 | 7 | 8 |
| 2023 | 3 | 10 |
| 2024 | 5 | 12 |
| 2025 | 9 | 6 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Silica wet gel and aerogel1 Sep 2026US 12,722,355 B2Cardinal CG Company
- Aerogel blanket1 Sep 2026US 12,722,979 B2LG Chem.Ltd.
- Method of manufacturing silica aerogel10 Mar 2026US 12,570,535 B2LG Chem.Ltd.
- Silica aerogel with increased alkaline stability6 Jan 2026US 12,515,958 B2Evonik Operations GmbH
- Aerogel composite25 Nov 2025US 12,479,734 B2LG Chem.Ltd.
- Method for preparing silica aerogel blanket17 Sep 2026US 2026/0274689 A1LG Chem.Ltd.
- Polishing agent for gallium oxide substrates, and polishing method27 Aug 2026US 2026/0250551 A1Nissan Chemical Corporation
- Silica aerogel and aging and drying method thereof2 Jul 2026US 2026/0184578 A1Ping Gong
- Method for producing hydrophobic silica aerogel blanket, and silica aerogel blanket2 Apr 2026US 2026/0091981 A1LG Chem.Ltd.
- Aerogel Composite5 Feb 2026US 2026/0035254 A1LG Chem.Ltd.
Most cited
By later US patents
- Process for the preparation of silica spheres46US 4,640,807 AShell Oil Company · 1987
- Method for preparation of perfectly spherical particles of silicagel with controlled size and controlled pore dimensions45US 4,104,363 ACeskoslovenska akademie ved · 1978
- Process for producing finely divided powdery metal oxide compositions38US 4,764,357 AAkzo America Inc. · 1988
- Thin silica flakes and method of making34US 4,971,697 AMinnesota Mining and Manufacturing Company · 1990
- Organically modified aerogels, processes for their preparation by surface modification of the aqueous gel, without prior solvent exchange, and subsequent drying, and their use32US 7,470,725 B2Cabot Corporation · 2008