C01B 33/023
By reduction of silica or free silica-containing material
Official title: by reduction of silica or {free} silica-containing material
C01B33/023 (By reduction of silica or free silica-containing material) appears on 134 US grants and 197 published applications in this corpus.
Search patents in C01B- Granted patents
- 134
- Published applications
- 197
- Assignees
- 139
- Inventors
- 443
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 3 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 0 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 0 | 0 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 3 |
| 2008 | 0 | 3 |
| 2009 | 3 | 4 |
| 2010 | 0 | 8 |
| 2011 | 3 | 18 |
| 2012 | 3 | 9 |
| 2013 | 6 | 13 |
| 2014 | 3 | 9 |
| 2015 | 4 | 6 |
| 2016 | 3 | 3 |
| 2017 | 7 | 12 |
| 2018 | 8 | 14 |
| 2019 | 4 | 6 |
| 2020 | 5 | 6 |
| 2021 | 7 | 11 |
| 2022 | 7 | 15 |
| 2023 | 6 | 16 |
| 2024 | 10 | 18 |
| 2025 | 3 | 7 |
| 2026 | 8 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Circular carbon process29 Sep 2026US 12,747,159 B2BASF SE
- Multi-stage magnesiothermic reduction for production of silicon oxides with reduced silicon grain size25 Aug 2026US 12,715,775 B2Mitsubishi Chemical Corporation
- Apparatus for producing reduced silicon nanopowder using laser30 Jun 2026US 12,668,492 B2Knu-Industry Cooperation Foundation
- Silicon composition and methods of forming the same while forming a silicon dioxide doped carbon-based nanomaterial9 Jun 2026US 12,649,694 B2Nabors Energy Transition Solutions LLC
- Large diameter silicon carbide single crystals and apparatus and method of manufacture thereof5 May 2026US 12,618,171 B2II-Vi Advanced Materials, LLC
- Method for producing porous silicon electrode active material particles, porous silicon electrode active material particles, electrode mixture, and battery17 Sep 2026US 2026/0274685 A1Toyota Jidosha Kabushiki Kaisha
- Method of making passivated silicon nanoparticles6 Aug 2026US 2026/0225899 A1
- Anode active material and solid-state battery23 Jul 2026US 2026/0209052 A1Toyota Jidosha Kabushiki Kaisha
- Carbon-silicon composites and method of production thereof25 Jun 2026US 2026/0179910 A1Nanovace Technologies Limited
- Anode active material, solid-state battery, and method for manufacturing anode active material28 May 2026US 2026/0145952 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Anodes including mesoporous hollow silicon particles and a method for synthesizing mesoporous hollow silicon particles66US 9,123,939 B2GM Global Technology Operations LLC · 2015
- Semicontinuous process for the manufacture of pure silicon54US 4,312,850 AHelictronic Forschungs- und Entwicklungs- Gesellschaft fur Solarzellen-Grundstoffe mbH · 1982
- System and method for producing solar grade silicon33US 7,572,425 B2General Electric Company · 2009
- Method of manufacturing silicon from powdered material containing silica28US 4,439,410 ASKF Steel Engineering Aktiebolag · 1984
- Method for producing solar cell-grade silicon from rice hulls25US 4,214,920 AExxon Research & Engineering Co. · 1980