C04B 33/1357
Sewage sludge ash or slag
Official title: {Sewage sludge ash or slag}
C04B33/1357 (Sewage sludge ash or slag) appears on 6 US grants and 4 published applications in this corpus.
Search patents in C04B- Granted patents
- 6
- Published applications
- 4
- Assignees
- 8
- Inventors
- 22
- Latest grant
- 29 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 2 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Process for preparing a ceramic article containing sludge29 Jul 2025US 12,371,380 B2Harbour Stone B.V.
- Industrial solid waste based construction and technical ceramics23 Apr 2024US 11,964,914 B2Seramic Materials Limited
- Method of making waterproof magnesium oxychloride refractory brick by fly ash from municipal solid waste incineration22 Mar 2022US 11,279,655 B2Tsinghua University
- Process for casting and forming slag products6 Nov 2001US 6,311,522 B1Slaytech Inc.
- Ceramic tile produced from sludge slag29 Dec 1992US 5,175,134 ANKK Corporation
- Industrial solid waste based construction and technical ceramics1 Jul 2021US 2021/0198151 A1Seramic Materials Limited
- Process for Preparing a Ceramic Article Containing Sludge18 Feb 2021US 2021/0047239 A1Harbour Stone B.V.
- Method of making waterproof magnesium oxychloride refractory brick by fly ash from municipal solid waste incineration24 Dec 2020US 2020/0399182 A1Tsinghua University
- Porous ceramic and method for manufacturing the same10 May 2007US 2007/0105705 A1Entec Co., Ltd.
Most cited
By later US patents