C04B 33/04
Clay
Official title: Clay; Kaolin
C04B33/04 (Clay) appears on 286 US grants and 365 published applications in this corpus.
Search patents in C04B- Granted patents
- 286
- Published applications
- 365
- Assignees
- 253
- Inventors
- 844
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 5 | 0 |
| 1990 | 8 | 0 |
| 1991 | 4 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 7 | 0 |
| 1998 | 1 | 0 |
| 1999 | 3 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 3 |
| 2003 | 4 | 6 |
| 2004 | 4 | 9 |
| 2005 | 4 | 8 |
| 2006 | 3 | 12 |
| 2007 | 5 | 15 |
| 2008 | 3 | 19 |
| 2009 | 8 | 12 |
| 2010 | 7 | 17 |
| 2011 | 7 | 10 |
| 2012 | 6 | 8 |
| 2013 | 8 | 7 |
| 2014 | 9 | 10 |
| 2015 | 6 | 16 |
| 2016 | 10 | 14 |
| 2017 | 12 | 28 |
| 2018 | 17 | 30 |
| 2019 | 18 | 18 |
| 2020 | 15 | 23 |
| 2021 | 11 | 24 |
| 2022 | 8 | 13 |
| 2023 | 14 | 20 |
| 2024 | 11 | 20 |
| 2025 | 11 | 8 |
| 2026 | 12 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Biochar for stable solidification of heavy metals8 Sep 2026US 12,729,162 B2Chinese Research Academy of Environmental Sciences
- Nanoporous ceramic for atomization core and preparation method thereof11 Aug 2026US 12,703,664 B2Huizhou Happy Vaping Technology Limited
- Building materials and components and methods of making the same4 Aug 2026US 12,698,237 B2University of Wyoming
- Nanomaterial ceramic spheres, preparation method, and application thereof16 Jun 2026US 12,655,062 B2
- Composition for additive manufacturing by binder jet printing and method for additive manufacturing by binder jet printing16 Jun 2026US 12,655,063 B2Porcelanas Da Costa Verde S.A.
- Composition For Producing Components8 Oct 2026US 2026/0308055 A1Kruner Industries AG
- Nanomaterial ceramic sphere, preparation method and application thereof24 Sep 2026US 2026/0285761 A1
- Pottery base material17 Sep 2026US 2026/0274752 A1Toto Ltd.
- Ceramic particles for use in a solar power tower17 Sep 2026US 2026/0276244 A1Carbo Ceramics Inc.
- Building materials and components and methods of making the same10 Sep 2026US 2026/0265146 A1University of Wyoming
Most cited
By later US patents
- Light weight abrasive tumbling media and method of making same118US 5,049,166 AWashington Mills Ceramics Corporation · 1991
- Lightweight oil and gas well proppants103US 5,030,603 ANorton-Alcoa · 1991
- Composition and method for use with ceramic matrix composite T-sections102US 7,972,430 B2General Electric Company · 2011
- Lightweight proppant for oil and gas wells and methods for making and using same72US 4,921,820 ANorton-Alcoa Proppants · 1990
- Lightweight oil and gas well proppants and methods for making and using same55US 4,921,821 ANorton-Alcoa Proppants · 1990