C04B 33/1321
Waste slurries
Official title: {Waste slurries, e.g. harbour sludge, industrial muds}
C04B33/1321 (Waste slurries) appears on 47 US grants and 50 published applications in this corpus.
Search patents in C04B- Granted patents
- 47
- Published applications
- 50
- Assignees
- 46
- Inventors
- 156
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 3 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 2 |
| 2008 | 0 | 5 |
| 2009 | 3 | 2 |
| 2010 | 2 | 3 |
| 2011 | 1 | 0 |
| 2012 | 3 | 0 |
| 2013 | 2 | 4 |
| 2014 | 1 | 2 |
| 2015 | 2 | 0 |
| 2016 | 2 | 2 |
| 2017 | 0 | 1 |
| 2018 | 1 | 3 |
| 2019 | 1 | 3 |
| 2020 | 1 | 3 |
| 2021 | 3 | 7 |
| 2022 | 3 | 3 |
| 2023 | 3 | 2 |
| 2024 | 3 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Highly dense red mud shields for X-ray and γ-ray attenuation29 Sep 2026US 12,747,190 B2Council of Scientific and Industrial Research
- Process for preparing a ceramic article containing sludge29 Jul 2025US 12,371,380 B2Harbour Stone B.V.
- Multi-function ecological exterior wall and preparation method therefor25 Jun 2024US 12,018,479 B2Shanxi Tianhe New Material Technology Co., Ltd.
- Industrial solid waste based construction and technical ceramics23 Apr 2024US 11,964,914 B2Seramic Materials Limited
- Process for producing proppants20 Feb 2024US 11,905,463 B2
- Ceramic structure compositions and methods for making the same from algal biomass21 May 2026US 2026/0138924 A1Georgia Southern University Research and Service Foundation, Inc.
- Method for preparing lightweight aggregates9 Oct 2025US 2025/0313510 A1Seegex
- Bricks/pavers made from desalinated sediment and process of making same2 Jan 2025US 2025/0002408 A1
- Highly dense red mud shields for x-ray and gamma-ray attenuation18 Jan 2024US 2024/0018050 A1Council of Scientific and Industrial Research
- Red mud-based composite calcium ferrite and preparation method and use thereof20 Apr 2023US 2023/0117352 A1University of Science and Technology Beijing
Most cited
By later US patents
- Waste treatment45US 4,872,993 A1989
- Synthetic aggregates comprising sewage sludge and other waste materials and methods for producing such aggregates40US 7,655,088 B2Alkemy, Ltd. · 2010
- Ceramic proppant with low specific weight24US 7,521,389 B2ILEM Research and Development Establishment · 2009
- Refractory material produced from red mud21US 5,106,797 AAlcan International Limited · 1992
- Method of using sludge for making ceramic articles16US 4,112,033 ALingl Corporation · 1978