D21C 3/006
Pulping cellulose-containing materials: with compounds not otherwise provided for
Official title: {with compounds not otherwise provided for}
D21C3/006 (Pulping cellulose-containing materials: with compounds not otherwise provided for) appears on 29 US grants and 38 published applications in this corpus.
Search patents in D21C- Granted patents
- 29
- Published applications
- 38
- Assignees
- 32
- Inventors
- 82
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 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 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 2 | 2 |
| 2013 | 1 | 1 |
| 2014 | 0 | 2 |
| 2015 | 0 | 2 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 3 |
| 2019 | 1 | 1 |
| 2020 | 0 | 3 |
| 2021 | 0 | 6 |
| 2022 | 2 | 1 |
| 2023 | 2 | 4 |
| 2024 | 1 | 2 |
| 2025 | 5 | 3 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Processes for fractionation of biomass4 Aug 2026US 12,698,590 B2The Board of Trustees of The University of Alabama
- Extraction of delignified, cellulose-based fibers from natural plant material, and materials incorporating such fibers12 May 2026US 12,624,500 B2University of Maryland, College Park
- Evaporative devices having delignified plant materials, and systems and methods for fabrication and use thereof30 Dec 2025US 12,509,822 B2University of Maryland, College Park
- Lignocellulose refinery23 Dec 2025US 12,503,410 B2Katholieke Universiteit Leuven
- Process for increasing digestion efficiency of lignocellulosic material in a treatment vessel8 Jul 2025US 12,351,981 B2Solenis Technologies, L.P.
- Extraction of delignified, cellulose-based fibers from natural plant material, and materials incorporating such fibers26 Feb 2026US 2026/0055552 A1University of Maryland, College Park
- Process for increasing digestion efficiency of lignocellulosic material in a treatment vessel30 Oct 2025US 2025/0333905 A1Solenis Technologies, L.P.
- Use of cellulase to improve viscosity control of kraft dissolving pulp9 Oct 2025US 2025/0314012 A1Novozymes A/S
- Processes for fractionation of biomass6 Mar 2025US 2025/0075425 A1The Board of Trustees of The University of Alabama
- Method for digesting lignocellulosic material30 May 2024US 2024/0175205 A1Solenis Technologies, L.P.
Most cited
By later US patents
- Alkaline peroxide treatment of agricultural byproducts58US 4,806,475 AThe United States of America as represented by the Secretary of Agriculture · 1989
- Method of producing pulp using single-stage cooking with formic acid and washing with performic acid56US 6,156,156 AChempolis Oy · 2000
- Alkaline peroxide treatment of nonwoody lignocellulosics51US 4,649,113 AThe United States of America as represented by the Secretary of Agriculture · 1987
- Chemical method for lignin depolymerization39US 6,214,976 B12001
- Process for preparing pulp using potassium-based alkaline solution21US 5,306,392 A1994