D21C 11/063
Treatment of gas streams comprising solid matter
Official title: {Treatment of gas streams comprising solid matter, e.g. the ashes resulting from the combustion of black liquor (evaporation of pulp liquors by direct contact with gases D21C11/103; post-combustion of gases D21C11/127)}
D21C11/063 (Treatment of gas streams comprising solid matter) appears on 52 US grants and 24 published applications in this corpus.
Search patents in D21C- Granted patents
- 52
- Published applications
- 24
- Assignees
- 39
- Inventors
- 126
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 2 |
| 2017 | 2 | 0 |
| 2018 | 0 | 3 |
| 2019 | 0 | 2 |
| 2020 | 2 | 1 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
| 2024 | 0 | 5 |
| 2025 | 1 | 0 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- System and method for the removal of non-process elements from electrostatic precipitator ashes in a kraft pulp process14 Jul 2026US 12,680,228 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Centralized control of multiple sorting facilities14 Apr 2026US 12,599,914 B2AMP Robotics Corporation
- Reconfigurable sorting facility24 Feb 2026US 12,558,695 B2AMP Robotics Corporation
- Method for removing ammonia from non-condensable gases of a pulp mill14 Jan 2025US 12,195,917 B2Valmet Technologies Oy
- Method of treating fly ash of a recovery boiler15 Aug 2023US 11,725,341 B2Andritz Inc.
- Centralized control of multiple sorting facilities25 Jun 2026US 2026/0176818 A1AMP Robotics Corporation
- System and Process for Reducing Chemical Losses in Treating Ash Produced in a Recovery Boiler of a Wood Pulping Process12 Feb 2026US 2026/0042676 A1Veolia Water Technologies, Inc.
- Reconfigurable sorting facility22 Jan 2026US 2026/0021491 A1AMP Robotics Corporation
- Reconfigurable sorting facility26 Sep 2024US 2024/0317505 A1AMP Robotics Corporation
- Dynamic bale creation12 Sep 2024US 2024/0299953 A1
Most cited
By later US patents
- Electromembrane processes for the treatment of kraft mill electrostatic precipitator catch38US 5,567,293 APulp and Paper Research Institute of Canada · 1996
- Process for chemicals and energy recovery from waste liquors36US 4,808,264 A1989
- Ultra-high particulate collection of sub-micron aerosols17US 6,238,459 B1The Babcock & Wilcox Company · 2001
- Process for recovering energy and chemicals from spent liquor in pulp preparation16US 4,872,950 A1989
- Recovery of heat and chemical values from spent pulping liquors13US 4,526,760 AInternational Paper Company · 1985