C01B 33/12
Silica
Official title: Silica; Hydrates thereof, e.g. lepidoic silicic acid
C01B33/12 (Silica) appears on 2,422 US grants and 2,807 published applications in this corpus.
Search patents in C01B- Granted patents
- 2,422
- Published applications
- 2,807
- Assignees
- 1,275
- Inventors
- 6,277
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 25 | 0 |
| 1978 | 15 | 0 |
| 1979 | 9 | 0 |
| 1980 | 15 | 0 |
| 1981 | 19 | 0 |
| 1982 | 15 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 18 | 0 |
| 1986 | 24 | 0 |
| 1987 | 18 | 0 |
| 1988 | 18 | 0 |
| 1989 | 23 | 0 |
| 1990 | 20 | 0 |
| 1991 | 29 | 0 |
| 1992 | 24 | 0 |
| 1993 | 35 | 0 |
| 1994 | 25 | 0 |
| 1995 | 25 | 0 |
| 1996 | 20 | 0 |
| 1997 | 31 | 0 |
| 1998 | 39 | 0 |
| 1999 | 52 | 0 |
| 2000 | 36 | 0 |
| 2001 | 41 | 15 |
| 2002 | 49 | 40 |
| 2003 | 36 | 83 |
| 2004 | 44 | 56 |
| 2005 | 35 | 64 |
| 2006 | 33 | 73 |
| 2007 | 32 | 71 |
| 2008 | 25 | 65 |
| 2009 | 40 | 81 |
| 2010 | 50 | 103 |
| 2011 | 61 | 97 |
| 2012 | 44 | 99 |
| 2013 | 64 | 79 |
| 2014 | 62 | 107 |
| 2015 | 81 | 103 |
| 2016 | 76 | 106 |
| 2017 | 72 | 117 |
| 2018 | 105 | 166 |
| 2019 | 118 | 157 |
| 2020 | 108 | 160 |
| 2021 | 114 | 178 |
| 2022 | 116 | 195 |
| 2023 | 115 | 146 |
| 2024 | 131 | 177 |
| 2025 | 125 | 171 |
| 2026 | 71 | 98 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C01B 33/18Preparation of finely divided silica neither in sol nor in gel form1,074
- C01B 33/14Colloidal silica888
- C01B 33/126Preparation of silica of undetermined type225
- C01B 33/16Preparation of silica xerogels192
- C01B 33/124Preparation of adsorbing porous silica not in gel form and not finely44
- C01B 33/122Lepidoic silicic acid4
Recent patents
- Photosensitive composition for forming light blocking layer of organic light emitting device6 Oct 2026US 12,754,477 B2Duk San Neolux Co., Ltd.
- Method of preparing high-concentration colloidal silica29 Sep 2026US 12,747,161 B2Korea Institute of Science and Technology
- Heat resistant aerogel materials15 Sep 2026US 12,735,554 B2Aspen Aerogels, Inc.
- Negative electrode material, negative electrode plate, and electrochemical apparatus and electronic apparatus containing such negative electrode plate8 Sep 2026US 12,731,783 B2Ningde Amperex Technology Limited
- Silica wet gel and aerogel1 Sep 2026US 12,722,355 B2Cardinal CG Company
- Lime and hydraulic cement manufacture by electrolysis using hyaloclastite or lava, carbon mineralization by hyaloclastite or lava electrolysis and method of making and using same8 Oct 2026US 2026/0308006 A1Greencraft LLC
- Process for base-catalyzed reaction of silicones with hydrothermal or supercritical water1 Oct 2026US 2026/0295547 A1Wacker Chemie AG
- Method for producing cation-modified silica and cation-modified silica dispersion liquid1 Oct 2026US 2026/0296901 A1
- Producing silica nanoparticles during mineral carbonation1 Oct 2026US 2026/0296902 A1Wisconsin Alumni Research Foundation
- Methods of making carbon coated particles from reclaimed carbon and other particles1 Oct 2026US 2026/0297731 A1Cabot Corporation
Most cited
By later US patents
- Fluorescent silica-based nanoparticles1,448US 8,298,677 B2Cornell Research Foundation, Inc. · 2012
- High modulus, low dielectric constant coatings575US 6,576,300 B1Axcelis Technologies, Inc. · 2003
- Plasma curing of MSQ-based porous low-k film materials567US 6,759,098 B2Axcelis Technologies, Inc. · 2004
- Plasma curing process for porous silica thin film556US 6,558,755 B2Axcelis Technologies, Inc. · 2003
- Plasma curing process for porous low-k materials529US 6,913,796 B2Axcelis Technologies, Inc. · 2005