D21C 7/06
Feeding devices
D21C7/06 (Feeding devices) appears on 169 US grants and 138 published applications in this corpus.
Search patents in D21C- Granted patents
- 169
- Published applications
- 138
- Assignees
- 66
- Inventors
- 215
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 9 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 12 | 0 |
| 2001 | 13 | 5 |
| 2002 | 8 | 8 |
| 2003 | 6 | 15 |
| 2004 | 1 | 4 |
| 2005 | 1 | 4 |
| 2006 | 2 | 3 |
| 2007 | 3 | 4 |
| 2008 | 4 | 5 |
| 2009 | 1 | 2 |
| 2010 | 2 | 7 |
| 2011 | 2 | 8 |
| 2012 | 3 | 5 |
| 2013 | 4 | 5 |
| 2014 | 15 | 5 |
| 2015 | 8 | 6 |
| 2016 | 3 | 2 |
| 2017 | 6 | 11 |
| 2018 | 3 | 4 |
| 2019 | 5 | 5 |
| 2020 | 1 | 4 |
| 2021 | 3 | 11 |
| 2022 | 7 | 4 |
| 2023 | 1 | 2 |
| 2024 | 9 | 1 |
| 2025 | 1 | 5 |
| 2026 | 2 | 3 |
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.
- Method and apparatus for treating mixtures of liquids and solids19 May 2026US 12,630,976 B2Lean Pulp Oy
- Apparatuses, methods and systems for yield increase in a kraft cooking plant25 Feb 2025US 12,234,602 B2Bracell Bahia Specialty Cellulose SA
- Method and apparatus for treating lignocellulosic material10 Dec 2024US 12,163,283 B2Sustainable Fiber Technologies, LLC
- Lignocellulosic biomass treatment method26 Nov 2024US 12,152,110 B2Agro Industries Recherche Et Developpement
- Screw housing and plug screw feeder1 Oct 2026US 2026/0297847 A1Valmet Corporation
- System and method for controlling the cleaning of a feeder housing in a high-pressure feeder24 Sep 2026US 2026/0286606 A1Valmet Corporation
- Sheet production apparatus and sheet production method of sheet production apparatus22 Jan 2026US 2026/0022516 A1Seiko Epson Corporation
- Apparatuses, methods and systems for yield increase in a kraft cooking plant22 May 2025US 2025/0163643 A1Bracell Bahia Specialty Cellulose SA
- Reaction chamber, processing system and processing method13 Mar 2025US 2025/0084589 A1Trifilon AB
Most cited
By later US patents
- Chip feeding for a continuous digester38US 5,476,572 AKamyr, Inc. · 1995
- Method and system for feeding comminuted fibrous material35US 5,753,075 A1998
- Apparatus and method for the displacement impregnation of cellulosic chips material32US 4,071,399 AKamyr, Inc. · 1978
- Chip pumping to a digester28US 5,622,598 AAhlstrom Machinery Inc. · 1997
- Chip feeding for a continuous digester27US 5,700,355 AAhlstrom Machinery Inc. · 1997