C04B 33/132
Waste materials
Official title: Waste materials; Refuse {; Residues} (C04B33/16 takes precedence)
C04B33/132 (Waste materials) appears on 211 US grants and 235 published applications in this corpus.
Search patents in C04B- Granted patents
- 211
- Published applications
- 235
- Assignees
- 197
- Inventors
- 580
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 4 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 9 | 0 |
| 2002 | 5 | 7 |
| 2003 | 2 | 5 |
| 2004 | 4 | 4 |
| 2005 | 2 | 8 |
| 2006 | 4 | 5 |
| 2007 | 5 | 10 |
| 2008 | 2 | 11 |
| 2009 | 4 | 5 |
| 2010 | 8 | 18 |
| 2011 | 5 | 9 |
| 2012 | 11 | 9 |
| 2013 | 10 | 11 |
| 2014 | 6 | 13 |
| 2015 | 10 | 6 |
| 2016 | 10 | 9 |
| 2017 | 6 | 5 |
| 2018 | 2 | 6 |
| 2019 | 6 | 12 |
| 2020 | 7 | 12 |
| 2021 | 5 | 22 |
| 2022 | 9 | 7 |
| 2023 | 10 | 14 |
| 2024 | 12 | 11 |
| 2025 | 6 | 5 |
| 2026 | 7 | 11 |
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
- Biochar for stable solidification of heavy metals8 Sep 2026US 12,729,162 B2Chinese Research Academy of Environmental Sciences
- Building materials and components and methods of making the same2 Jun 2026US 12,643,824 B2
- Homogenizing method and device for mixing cow dung granules into clay bricks5 May 2026US 12,617,124 B2
- Manufacturing process of calcined clays in a rotary kiln with color control7 Apr 2026US 12,595,210 B2Cementos Argos S.A.
- Method for reducing carbon-based emissions and/or carbon-based casting defects during a moulding cycle of a moulding material containing smectite containing clay, said moulding cycle comprising two or more cycles16 Jul 2026US 2026/0199963 A1HüTtenes-Albertus Chemische Werke Gesellschaft Mit BeschräNkter Haftung
- Moulding material for producing a clay-bonded mould, and use thereof in a moulding material cycle16 Jul 2026US 2026/0200801 A1HüTtenes-Albertus Chemische Werke Gesellschaft Mit BeschräNkter Haftung
- Method for guiding a moulding material in a moulding material cycle comprising two or more cycles16 Jul 2026US 2026/0200805 A1HüTtenes-Albertus Chemische Werke Gesellschaft Mit BeschräNkter Haftung
- Method for guiding a moulding material in a moulding material cycle comprising two or more cycles16 Jul 2026US 2026/0200806 A1HüTtenes-Albertus Chemische Werke Gesellschaft Mit BeschräNkter Haftung
- Porous material for wellbore thermal insulation in drilling and its preparation method and application11 Jun 2026US 2026/0159745 A1China Univesity of Petroleum (East China)
Most cited
By later US patents
- Waste treatment45US 4,872,993 A1989
- Proppants and their manufacture43US 7,160,844 B2Global Synfrac Inc. · 2007
- Synthetic aggregates comprising sewage sludge and other waste materials and methods for producing such aggregates40US 7,655,088 B2Alkemy, Ltd. · 2010
- Method of treating spent potliner material from aluminum reduction cells32US 5,723,097 AGoldendale Aluminum Company · 1998
- Ceramic products, of glass, fly ash and clay and methods of making the same28US 5,583,079 A1996