C04B 41/68
Silicic acid
Official title: Silicic acid; Silicates
C04B41/68 (Silicic acid) appears on 79 US grants and 70 published applications in this corpus.
Search patents in C04B- Granted patents
- 79
- Published applications
- 70
- Assignees
- 57
- Inventors
- 149
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 3 | 0 |
| 2002 | 2 | 2 |
| 2003 | 2 | 0 |
| 2004 | 0 | 5 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 1 | 1 |
| 2008 | 1 | 2 |
| 2009 | 3 | 1 |
| 2010 | 1 | 0 |
| 2011 | 1 | 3 |
| 2012 | 1 | 2 |
| 2013 | 1 | 3 |
| 2014 | 1 | 1 |
| 2015 | 5 | 1 |
| 2016 | 5 | 5 |
| 2017 | 3 | 3 |
| 2018 | 1 | 3 |
| 2019 | 2 | 4 |
| 2020 | 3 | 6 |
| 2021 | 2 | 2 |
| 2022 | 5 | 9 |
| 2023 | 3 | 3 |
| 2024 | 6 | 7 |
| 2025 | 3 | 3 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Concrete protection material, and preparation method and construction method therefor5 May 2026US 12,617,732 B2Anhui Engineering Material Technology Co, Ltd of Ctce Group
- Latent heat storage gypsum board and partition structure9 Dec 2025US 12,492,330 B2Yoshino Gypsum Co., Ltd.
- Modified calcium silicate board and surface treatment method and application thereof29 Jul 2025US 12,371,390 B2Jiangsu Longing New Material Technology Co., Ltd
- Full-fiber burner brick and preparation method thereof1 Apr 2025US 12,264,105 B2Luyang Energy-Saving Materials Co., Ltd.
- Decorative glow-in-the-dark concrete block29 Oct 2024US 12,129,213 B1Imam Abdulrahman Bin Faisal University
- Composition and methods for increasing surface hardness of concrete21 May 2026US 2026/0138933 A1Curecrete Distribution, Inc.
- Curable geopolymer slurry and treatement compositions and methods for producing and using said compositions12 Mar 2026US 2026/0070844 A1Schlumberger Technology Corporation
- Additive or sealing composition for cementitous compositions, cementitious composition, methods of manufacturing the same, and methods of preparing a cementitious structure and treating a surface thereof29 May 2025US 2025/0171370 A1Construction Research & Technology GmbH
- System and method for exposed aggregate architectural coating for exisiting concrete structures29 May 2025US 2025/0171374 A1
- Alkali metal polyborate silicate coating for acoustical panel and gypsum board2 Jan 2025US 2025/0002420 A1USG Interiors, Inc.
Most cited
By later US patents
- Process for preparing a water repellent silica sol78US 5,651,921 AIdemitsu Kosan Co., Ltd. · 1997
- Agent and method for modifying surface layer of cement structures28US 4,443,496 ANissan Chemical Industries, Ltd. · 1984
- Method of preventing deterioration of inorganic substrate surface27US 4,006,030 ANissan Chemical Industries, Ltd. · 1977
- Thermal barrier compositions26US 4,095,985 AVast Products Inc. · 1978
- Method of hardening and polishing concrete floors, walls, and the like25US 6,454,632 B1Curecrete Chemical Company, Inc. · 2002