C01B 33/187
By acidic treatment of silicates
Official title: by acidic treatment of silicates
C01B33/187 (By acidic treatment of silicates) appears on 347 US grants and 301 published applications in this corpus.
Search patents in C01B- Granted patents
- 347
- Published applications
- 301
- Assignees
- 153
- Inventors
- 714
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 8 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 2 | 0 |
| 1991 | 6 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 4 | 0 |
| 1997 | 13 | 0 |
| 1998 | 9 | 0 |
| 1999 | 20 | 0 |
| 2000 | 6 | 0 |
| 2001 | 10 | 2 |
| 2002 | 8 | 7 |
| 2003 | 4 | 19 |
| 2004 | 6 | 7 |
| 2005 | 6 | 14 |
| 2006 | 10 | 12 |
| 2007 | 5 | 11 |
| 2008 | 2 | 12 |
| 2009 | 8 | 12 |
| 2010 | 11 | 8 |
| 2011 | 8 | 16 |
| 2012 | 7 | 12 |
| 2013 | 8 | 9 |
| 2014 | 3 | 15 |
| 2015 | 13 | 22 |
| 2016 | 10 | 7 |
| 2017 | 13 | 15 |
| 2018 | 14 | 8 |
| 2019 | 9 | 3 |
| 2020 | 4 | 15 |
| 2021 | 11 | 18 |
| 2022 | 11 | 9 |
| 2023 | 4 | 8 |
| 2024 | 15 | 13 |
| 2025 | 6 | 18 |
| 2026 | 3 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Spherical, low surface area precipitated silicas as matting agents in powder coatings30 Jun 2026US 12,668,494 B2Evonik Operations GmbH
- Precipitated silicic acids, process for their preparation and use thereof23 Jun 2026US 12,662,387 B2Evonik Operations GmbH
- Mesoporous silica manufactured in the presence of water-soluble ODSO21 Apr 2026US 12,606,447 B2Saudi Arabian Oil Company
- Hollow silica particles and method for manufacturing hollow silica particles4 Nov 2025US 12,459,826 B2AGC Inc.
- Method for producing spherical silica particles4 Nov 2025US 12,459,827 B2Admatechs Co., Ltd.
- Method of producing alkali metal silicate with reduced metal levels17 Sep 2026US 2026/0274693 A1Evonik Operations GmbH
- Abrasive-type silica for toothpaste with low specific surface area and low pore volume and preparation method therefor2 Jul 2026US 2026/0183202 A1Jin San Jiang (Zhaoqing) Silicon Material Co. Ltd
- Precipitated silica and methods thereof25 Jun 2026US 2026/0176147 A1Evonik Operations GmbH
- High-efficiency short-process production method and production system for carbonized silica9 Apr 2026US 2026/0097968 A1Yuanli Silicon Materials (Nanping) Co., Ltd.
- Spherical silica powder and method for producing spherical silica powder12 Mar 2026US 2026/0070795 A1AGC Inc.
Most cited
By later US patents
- Diene rubber composition for tire comprising a specific silica as reinforcing filler129US 7,250,463 B2Michelin Recherche et Technique S. A. · 2007
- Dentifrice compositions112US 5,658,553 AThe Procter & Gamble Company · 1997
- Dentifrice compositions111US 5,603,920 AThe Proctor & Gamble Company · 1997
- Production of carbonate-containing compositions from material comprising metal silicates111US 7,749,476 B2Calera Corporation · 2010
- Dentifrice compositions104US 5,651,958 AThe Procter & Gamble Company · 1997