C01B 33/181
By a dry process
Official title: {by a dry process}
C01B33/181 (By a dry process) appears on 215 US grants and 214 published applications in this corpus.
Search patents in C01B- Granted patents
- 215
- Published applications
- 214
- Assignees
- 141
- Inventors
- 616
- Latest grant
- 31 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 7 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 2 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 2 | 0 |
| 2001 | 5 | 2 |
| 2002 | 5 | 7 |
| 2003 | 3 | 9 |
| 2004 | 2 | 2 |
| 2005 | 5 | 5 |
| 2006 | 2 | 12 |
| 2007 | 4 | 5 |
| 2008 | 3 | 8 |
| 2009 | 7 | 11 |
| 2010 | 7 | 13 |
| 2011 | 8 | 7 |
| 2012 | 4 | 9 |
| 2013 | 5 | 6 |
| 2014 | 4 | 11 |
| 2015 | 5 | 2 |
| 2016 | 4 | 7 |
| 2017 | 4 | 8 |
| 2018 | 9 | 5 |
| 2019 | 9 | 10 |
| 2020 | 3 | 10 |
| 2021 | 6 | 11 |
| 2022 | 13 | 16 |
| 2023 | 5 | 12 |
| 2024 | 7 | 10 |
| 2025 | 8 | 8 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing silica particles and their use in cosmetic compositions31 Mar 2026US 12,589,061 B2Momentive Performance Materials Japan LLC
- 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
- Cristobalite as a pigment substitute and as a composition enhancing mineral, compositions containing the same, and articles and coatings prepared with such compositions10 Feb 2026US 12,545,788 B2U.S. Silica Company
- Negative electrode active material, negative electrode and method for producing them23 Sep 2025US 12,424,620 B2Shin-Etsu Chemical Co., Ltd.
- Spray evaporation of a liquid raw material for preparation of silicon dioxide and metal oxides9 Sep 2025US 12,410,061 B2Evonik Operations GmbH
- Fumed Silica for Rubber Composition and Method for Compressing Fumed Silica10 Sep 2026US 2026/0265488 A1Tokuyama Corporation
- Process for manufacturing oxides13 Aug 2026US 2026/0234007 A1Evonik Operations GmbH
- Process for manufacturing oxides13 Aug 2026US 2026/0234016 A1Evonik Operations GmbH
- Carbon-silicon composites and method of production thereof25 Jun 2026US 2026/0179910 A1Nanovace Technologies Limited
- Method for the preparation of high-purity cristobalite18 Jun 2026US 2026/0167506 A1Anhui Estone Material Technology Co., Ltd
Most cited
By later US patents
- Electrically assisted synthesis of particles and film with precisely controlled characteristic119US 6,254,940 B1University of Cincinnati · 2001
- Production of high viscosity index lubricating oil stock97US 5,075,269 AMobil Oil Corporation · 1991
- Process for producing ultra-fine ceramic particles84US 4,705,762 AToyota Jidosha Kabushiki Kaisha · 1987
- Plasma synthesis of metal oxide nanoparticles77US 7,217,407 B2E. I. Du Pont de Nemours and Company · 2007
- Method for making ultra-fine ceramic particles71US 4,610,857 AToyota Jidosha Kabushiki Kaisha · 1986