D21B 1/34
Kneading or mixing
Official title: Kneading or mixing; Pulpers
D21B1/34 (Kneading or mixing) appears on 178 US grants and 129 published applications in this corpus.
Search patents in D21B- Granted patents
- 178
- Published applications
- 129
- Assignees
- 124
- Inventors
- 324
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 6 | 0 |
| 1982 | 3 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 6 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 2 | 0 |
| 1995 | 7 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 1 |
| 2002 | 2 | 3 |
| 2003 | 4 | 4 |
| 2004 | 2 | 4 |
| 2005 | 2 | 5 |
| 2006 | 1 | 5 |
| 2007 | 4 | 4 |
| 2008 | 1 | 3 |
| 2009 | 3 | 2 |
| 2010 | 0 | 4 |
| 2011 | 3 | 3 |
| 2012 | 4 | 5 |
| 2013 | 2 | 8 |
| 2014 | 6 | 3 |
| 2015 | 4 | 3 |
| 2016 | 3 | 6 |
| 2017 | 2 | 4 |
| 2018 | 2 | 4 |
| 2019 | 5 | 7 |
| 2020 | 2 | 12 |
| 2021 | 7 | 8 |
| 2022 | 8 | 6 |
| 2023 | 2 | 3 |
| 2024 | 6 | 9 |
| 2025 | 3 | 8 |
| 2026 | 5 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sheet manufacturing apparatus21 Jul 2026US 12,686,969 B2Seiko Epson Corporation
- Accept tank mixing arrangement30 Jun 2026US 12,668,920 B2Andritz Inc.
- Method of making fire retardant materials and related products17 Mar 2026US 12,577,732 B2Cleanfiber Inc.
- Paper stock modification device10 Mar 2026US 12,571,160 B2Taizen Co., Ltd.
- Deflaking element for pulper10 Mar 2026US 12,571,161 B2Kadant Black Clawson LLC
- System and method for handling a ragger formed in a pulper process4 Jun 2026US 2026/0152902 A1
- Process and fibre processing apparatus for the preparation of a pulp additive from a sugar beet starting material7 May 2026US 2026/0125851 A1SIMPLY BY NATURE GmbH
- Apparatus and Method of Defibrillating and/or Defibering Cellulose Fibres and/or Ligno-cellulosic Fibres26 Mar 2026US 2026/0085470 A1Zelfo Technology GmbH
- Systems and methods for monitoring reject streams from fiber processing units5 Feb 2026US 2026/0035859 A1Kadant Black Clawson LLC
- Sheet production apparatus and sheet production method of sheet production apparatus22 Jan 2026US 2026/0022516 A1Seiko Epson Corporation
Most cited
By later US patents
- Materials size reduction systems and process73US 6,045,070 A2000
- Apparatus for gas or liquid admixture48US 4,416,548 ASunds Defibrator Aktiebolag · 1983
- Rotor for increasing mixing efficiency in a medium consistency mixer45US 5,263,774 AKamyr, Inc. · 1993
- Method for dispersing cellulose based fibers in water36US 5,849,155 AE. Khashoggi Industries · 1998
- Medium consistency liquid mixture34US 5,863,120 ABeloit Technologies, Inc. · 1999