D21C 7/08
Discharge devices
D21C7/08 (Discharge devices) appears on 82 US grants and 77 published applications in this corpus.
Search patents in D21C- Granted patents
- 82
- Published applications
- 77
- Assignees
- 48
- Inventors
- 139
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 3 |
| 2002 | 4 | 3 |
| 2003 | 1 | 4 |
| 2004 | 1 | 3 |
| 2005 | 1 | 2 |
| 2006 | 0 | 3 |
| 2007 | 1 | 1 |
| 2008 | 3 | 2 |
| 2009 | 1 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 10 |
| 2013 | 3 | 1 |
| 2014 | 4 | 4 |
| 2015 | 2 | 2 |
| 2016 | 6 | 3 |
| 2017 | 4 | 5 |
| 2018 | 3 | 2 |
| 2019 | 4 | 5 |
| 2020 | 1 | 2 |
| 2021 | 2 | 8 |
| 2022 | 5 | 5 |
| 2023 | 1 | 0 |
| 2024 | 6 | 3 |
| 2025 | 1 | 3 |
| 2026 | 3 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Optimization of chemical consumption in biomass delignification4 Aug 2026US 12,698,589 B2Sixring Inc.
- Treatment vessel having reduced outlet end diameter21 Apr 2026US 12,606,955 B2Valmet Corporation
- Optimization of chemical consumption in biomass delignification17 Feb 2026US 12,553,180 B2Sixring Inc.
- Method and system for continuously treating biomass material12 Aug 2025US 12,385,184 B2Valmet Corporation
- Arrangement and method for degassing a pump24 Dec 2024US 12,173,451 B2Andritz Inc.
- Discharge screw arrangement24 Sep 2026US 2026/0286607 A1Valmet Corporation
- Discharge arrangement for discharging lignocellulosic material17 Sep 2026US 2026/0275632 A1Valmet Corporation
- Arrangement and method for degassing a pump27 Mar 2025US 2025/0101681 A1Andritz Inc.
- Optimization of chemical consumption in biomass delignification13 Feb 2025US 2025/0052002 A1Sixring Inc.
- Reactor discharge30 Jan 2025US 2025/0034806 A1Valmet Corporation
Most cited
By later US patents
- Process for producing alkali pulp35US 4,274,913 AToyo Pulp Co., Ltd. · 1981
- Apparatus for discharge of pressure cooked particulate or fibrous material23US 4,211,163 A1980
- Method and apparatus for separating gas from a gaseous material20US 5,462,585 AA. Ahlstrom Corporation · 1995
- Method and apparatus for explosively defibrating cellulosic fiber16US 4,163,687 ACommonwealth Scientific and Industrial Research Organization · 1979
- Method for avoiding mechanical damage of pulp15US 6,719,878 B1Metso Chemical Pulping Oy · 2004