D21B 1/025
Separating pith from fibrous vegetable materials
Official title: {Separating pith from fibrous vegetable materials}
D21B1/025 (Separating pith from fibrous vegetable materials) appears on 12 US grants and 14 published applications in this corpus.
Search patents in D21B- Granted patents
- 12
- Published applications
- 14
- Assignees
- 11
- Inventors
- 19
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 3 |
| 2003 | 1 | 1 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 0 | 1 |
| 2020 | 1 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Corn stalk material, a method and apparatus for preparing it23 Aug 2016US 9,420,745 B2Shandong Tralin Paper Co., Ltd.
- Process of using non-wood fibers to create paper pulp16 Jul 2026US 2026/0201639 A1
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Most cited
By later US patents
- Apparatus for grading fibrous material7US 5,019,248 AAnkal Pty Limited · 1991
- Process for producing paper and absorbent products of increased strength6US 6,719,880 B2Weyerhaeuser Company · 2004
- Bagasse depither5US 5,266,161 ABeloit Technologies, Inc. · 1993
- Process for producing a wood pulp having reduced pitch content and process and reduced VOC-emissions4US 6,364,999 B1Weyerhaeuser Company · 2002
- Chemical wood pulping process with reduced pitch and VOC emissions2US 6,641,699 B2Weyerhauser Company · 2003