F23G 2209/101
Waste liquor
F23G2209/101 (Waste liquor) appears on 28 US grants and 18 published applications in this corpus.
Search patents in F23G- Granted patents
- 28
- Published applications
- 18
- Assignees
- 19
- Inventors
- 53
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 2 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 2 | 1 |
| 2003 | 0 | 0 |
| 2004 | 2 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 1 | 1 |
| 2008 | 2 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 2 |
| 2016 | 2 | 1 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 2 |
| 2022 | 1 | 1 |
| 2023 | 2 | 2 |
| 2024 | 1 | 0 |
| 2025 | 0 | 1 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Cooling shield for a liquor injection pipe of a liquor gun, liquor gun system comprising the cooling shield, and method for cooling a liquor injection pipe in a liquor gun system15 Sep 2026US 12,736,217 B2Valmet Corporation
- Method for controlling a chemical recovery boiler and a chemical recovery boiler1 Oct 2024US 12,104,319 B2Valmet Automation Oy
- Cleaning of a recovery boiler28 Nov 2023US 11,828,459 B2Varo Teollisuuspalvelut Oy
- Method for controlling carryover in a chemical recovery boiler and a chemical recovery boiler5 Sep 2023US 11,746,470 B2Valmet Automation Oy
- Furnace floor protection in recovery boilers15 Mar 2022US 11,274,824 B2Varo Teollisuuspalvelut Oy
- A gasket arrangement for a protruding bar of a boiler and a method of operating the gasket arrangement30 Jan 2025US 2025/0034808 A1Andritz Inc.
- Cooling shield for a liquor injection pipe of a liquor gun, liquor gun system comprising the cooling shield, and method for cooling a liquor injection pipe in a liquor gun system24 Aug 2023US 2023/0266001 A1Valmet Corporation
- Method for controlling a chemical recovery boiler and a chemical recovery boiler23 Feb 2023US 2023/0057366 A1Valmet Automation Oy
- Cleaning of a recovery boiler7 Apr 2022US 2022/0107085 A1Varo Teollisuuspalvelut Oy
- Method for controlling carryover in a chemical recovery boiler and a chemical recovery boiler11 Mar 2021US 2021/0071361 A1Valmet Automation Oy
Most cited
By later US patents
- Process for increasing the effectiveness of slag and/or corrosion control chemicals for combustion units34US 5,894,806 AFuel Tech, Inc. · 1999
- Process for increasing the effectiveness of slag control chemicals for black liquor recovery and other combustion units22US 5,740,745 ANalco Fuel Tech · 1998
- Method and apparatus for improving fluid flow and gas mixing in boilers20US 5,121,700 ASandwell and Company Limited · 1992
- Granulated solid fuel burner15US 4,574,711 A1986
- Methods of improving productivity of black liquor recovery boilers12US 5,992,337 AAir Liquide America Corporation · 1999