D21C 11/08
Deodorisation
Official title: Deodorisation {; Elimination of malodorous compounds, e.g. sulfur compounds such as hydrogen sulfide or mercaptans, from gas streams (oxidation of liquors D21C11/0057; post-combustion of gases D21C11/127)}
D21C11/08 (Deodorisation) appears on 29 US grants and 21 published applications in this corpus.
Search patents in D21C- Granted patents
- 29
- Published applications
- 21
- Assignees
- 19
- Inventors
- 66
- Latest grant
- 25 Nov 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 1 | 2 |
| 2011 | 1 | 2 |
| 2012 | 2 | 0 |
| 2013 | 1 | 0 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 5 |
| 2021 | 0 | 1 |
| 2022 | 3 | 2 |
| 2023 | 3 | 3 |
| 2024 | 0 | 1 |
| 2025 | 4 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Method of removing volatile compounds from a lignin-containing material, use of a distillation method, and a lignin-containing material25 Nov 2025US 12,479,876 B2Andritz Inc.
- Kraft pulping foul condensate treatment process and apparatus15 Jul 2025US 12,358,813 B2Noram Engineering and Constructors Ltd.
- Method for odor reduction of particulate carbon materials24 Jun 2025US 12,338,125 B2Suncoal Industries GmbH
- Method for removing ammonia from non-condensable gases of a pulp mill14 Jan 2025US 12,195,917 B2Valmet Technologies Oy
- Method and a system for adjusting S/Na-balance of a pulp mill25 Apr 2023US 11,634,864 B2Valmet Technologies Oy
- Method For Odor Reduction Of Particulate Carbon Materials16 Oct 2025US 2025/0320122 A1Suncoal Industries GmbH
- Systems and techniques for controlling odor emissions from pulp mills21 Nov 2024US 2024/0384467 A1Ecolab USA Inc.
- A method for removing ammonia from non-condensable gases of a pulp mill15 Jun 2023US 2023/0183920 A1Valmet Technologies Oy
- A method of removing volatile compounds from a lignin-containing material, use of a distillation method, and a lignin-containing material26 Jan 2023US 2023/0023359 A1Andritz Inc.
- Odor control pulp composition12 Jan 2023US 2023/0009849 A1International Paper Company
Most cited
By later US patents
- Method for removing odor from fluid33US 4,225,381 AOji Paper Co., Ltd. · 1980
- Process for recovering energy and chemicals from spent liquor in pulp preparation16US 4,872,950 A1989
- Method and arrangement for optimizing oxidation during burning of gaseous and liquid fuels11US 6,109,911 AKvaerner Pulping AB · 2000
- Composition and method for treating flue gas and methanol containing effluents9US 4,505,776 AWescam Services Inc. · 1985
- Alkaline scrubber for condensate stripper off-gases8US 5,450,892 AAlliedSignal Inc. · 1995