C01B 33/037
Purification
Official title: Purification (by zone-melting C30B13/00)
C01B33/037 (Purification) appears on 255 US grants and 334 published applications in this corpus.
Search patents in C01B- Granted patents
- 255
- Published applications
- 334
- Assignees
- 183
- Inventors
- 702
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 6 | 0 |
| 1981 | 4 | 0 |
| 1982 | 4 | 0 |
| 1983 | 2 | 0 |
| 1984 | 6 | 0 |
| 1985 | 4 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 6 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 2 |
| 2003 | 1 | 1 |
| 2004 | 1 | 2 |
| 2005 | 2 | 4 |
| 2006 | 0 | 5 |
| 2007 | 1 | 9 |
| 2008 | 2 | 20 |
| 2009 | 3 | 15 |
| 2010 | 15 | 34 |
| 2011 | 16 | 44 |
| 2012 | 13 | 38 |
| 2013 | 21 | 25 |
| 2014 | 16 | 9 |
| 2015 | 17 | 25 |
| 2016 | 15 | 8 |
| 2017 | 13 | 7 |
| 2018 | 4 | 15 |
| 2019 | 10 | 7 |
| 2020 | 2 | 13 |
| 2021 | 3 | 15 |
| 2022 | 10 | 8 |
| 2023 | 8 | 12 |
| 2024 | 8 | 6 |
| 2025 | 6 | 5 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Recycling silicon from batteries with silicon-based active materials11 Aug 2026US 12,706,332 B2Enevate Corporation
- Method for producing porous nanocrystalline silicon4 Aug 2026US 12,698,211 B2Uchicago Argonne, LLC
- Solar heating for thin film evaporation and directional solidification4 Aug 2026US 12,698,557 B2Blue Origin Manufacturing, LLC
- Method for manufacturing porous silicon and secondary battery anode active material containing same7 Jul 2026US 12,673,874 B2Dong-A University Research Foundation for Industry-Academy Cooperation
- Method, apparatus, and system for producing silicon-containing product by utilizing silicon mud byproduct of cutting silicon material with diamond wire17 Feb 2026US 12,552,675 B2
- Method for preparing silicon powders using waste silicon sludge, silicon powders for preparing a secondary battery negative-electrode material, and system for preparing silicon powders27 Aug 2026US 2026/0249334 A1Innox Ecom. Co., Ltd.
- Solar Panel Recycling Using Deep Eutectic Solvents20 Aug 2026US 2026/0247740 A1Battelle Memorial Institute
- Production of silicon particles having a reduced surface metal content19 Mar 2026US 2026/0078008 A1Wacker Chemie AG
- Method for preparing metallic magnesium and industrial silicon by decomposing serpentine with hydrochloric acid12 Mar 2026US 2026/0071343 A1Toli County Zhongda Magnesium Industry Co., Ltd
- Crushed polycrystalline silicon lumps and method for producing same5 Feb 2026US 2026/0035251 A1Tokuyama Corporation
Most cited
By later US patents
- Process for Polycrystalline film silicon growth529US 6,281,098 B1Midwest Research Institute · 2001
- Magnetoplasmadynamic apparatus and process for the separation and deposition of materials173US 4,471,003 A1984
- Magnetoplasmadynamic apparatus for the separation and deposition of materials104US 4,487,162 A1984
- Method of purifying silicon utilizing cascading process85US 8,580,218 B2Silicor Materials Inc. · 2013
- Sequential purification and crystal growth60US 4,200,621 AMotorola, Inc. · 1980