C04B 18/04
Waste materials
Official title: Waste materials; Refuse
C04B18/04 (Waste materials) appears on 1,498 US grants and 1,646 published applications in this corpus.
Search patents in C04B- Granted patents
- 1,498
- Published applications
- 1,646
- Assignees
- 1,077
- Inventors
- 4,096
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 20 | 0 |
| 1978 | 15 | 0 |
| 1979 | 11 | 0 |
| 1980 | 20 | 0 |
| 1981 | 18 | 0 |
| 1982 | 15 | 0 |
| 1983 | 26 | 0 |
| 1984 | 15 | 0 |
| 1985 | 13 | 0 |
| 1986 | 14 | 0 |
| 1987 | 8 | 0 |
| 1988 | 10 | 0 |
| 1989 | 9 | 0 |
| 1990 | 11 | 0 |
| 1991 | 13 | 0 |
| 1992 | 15 | 0 |
| 1993 | 21 | 0 |
| 1994 | 20 | 0 |
| 1995 | 21 | 0 |
| 1996 | 26 | 0 |
| 1997 | 17 | 0 |
| 1998 | 29 | 0 |
| 1999 | 34 | 0 |
| 2000 | 22 | 0 |
| 2001 | 27 | 3 |
| 2002 | 17 | 39 |
| 2003 | 20 | 47 |
| 2004 | 32 | 43 |
| 2005 | 23 | 27 |
| 2006 | 13 | 30 |
| 2007 | 15 | 34 |
| 2008 | 20 | 29 |
| 2009 | 14 | 34 |
| 2010 | 25 | 29 |
| 2011 | 27 | 27 |
| 2012 | 25 | 36 |
| 2013 | 30 | 50 |
| 2014 | 31 | 37 |
| 2015 | 37 | 36 |
| 2016 | 27 | 38 |
| 2017 | 29 | 72 |
| 2018 | 56 | 71 |
| 2019 | 42 | 89 |
| 2020 | 65 | 96 |
| 2021 | 61 | 111 |
| 2022 | 76 | 122 |
| 2023 | 93 | 139 |
| 2024 | 91 | 166 |
| 2025 | 105 | 125 |
| 2026 | 62 | 116 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C04B 18/06Combustion residues603
- C04B 18/18Organic351
- C04B 18/14From metallurgical processes278
- C04B 18/16From building or ceramic industry162
- C04B 18/0481Other specific industrial waste materials not provided for elsewhere in c04b18/0087
- C04B 18/12From quarries, mining or the like64
- C04B 18/0463Hazardous waste42
- C04B 18/0409Waste from the purification of bauxite22
Recent patents
- Pozzolan-based additive agent and uses thereof22 Sep 2026US 12,741,906 B2
- Light weight ceramic aggregates made by agglomerating ceramic fibers22 Sep 2026US 12,741,908 B2Unifrax I LLC
- Crystalline cellulose reinforced cement8 Sep 2026US 12,729,158 B2
- Binder for an agglomeration process8 Sep 2026US 12,729,161 B2Mintek
- Cement system for CO2 injection and sequestration in mafic/ultramafic rock and method of use8 Sep 2026US 12,729,607 B2Protostar Group Ltd.
- Cementitous compositions for reducing efflorescence8 Oct 2026US 2026/0308051 A1Tremco Cpg Inc.
- Hydraulic composition for ultra-high performance concrete and ultra-high performance grout8 Oct 2026US 2026/0308054 A1Sika Technology AG
- Hardened body of hydraulic composition8 Oct 2026US 2026/0308056 A1Kuraray Co., Ltd.
- Recycled Drywall Products and Systems8 Oct 2026US 2026/0308057 A1Qualico Developments West Ltd.
- Concrete recycling8 Oct 2026US 2026/0308059 A1
Most cited
By later US patents
- Universal fluids for drilling and cementing wells220US 5,464,060 AShell Oil Company · 1995
- Shaped article and composite material and method for producing same208US 4,588,443 AAktieselskabet Aalborg Pottland-Cement-Fabrik · 1986
- Solidification of water based muds198US 5,058,679 AShell Oil Company · 1991
- Plasma whirl reactor apparatus and methods of use164US 7,622,693 B2Foret Plasma Labs, LLC · 2009
- Process for forming a light-weight aggregate146US 4,741,782 AResource Technology, Inc. · 1988