D21C 5/005
Treatment of cellulose-containing material with microorganisms or enzymes
Official title: {Treatment of cellulose-containing material with microorganisms or enzymes}
D21C5/005 (Treatment of cellulose-containing material with microorganisms or enzymes) appears on 504 US grants and 521 published applications in this corpus.
Search patents in D21C- Granted patents
- 504
- Published applications
- 521
- Assignees
- 289
- Inventors
- 1,329
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 4 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 2 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 6 | 0 |
| 1994 | 11 | 0 |
| 1995 | 13 | 0 |
| 1996 | 10 | 0 |
| 1997 | 20 | 0 |
| 1998 | 24 | 0 |
| 1999 | 25 | 0 |
| 2000 | 20 | 0 |
| 2001 | 24 | 4 |
| 2002 | 15 | 10 |
| 2003 | 15 | 17 |
| 2004 | 5 | 16 |
| 2005 | 5 | 15 |
| 2006 | 8 | 20 |
| 2007 | 8 | 11 |
| 2008 | 5 | 22 |
| 2009 | 6 | 19 |
| 2010 | 8 | 21 |
| 2011 | 10 | 16 |
| 2012 | 11 | 28 |
| 2013 | 12 | 38 |
| 2014 | 27 | 35 |
| 2015 | 25 | 38 |
| 2016 | 13 | 34 |
| 2017 | 28 | 27 |
| 2018 | 23 | 25 |
| 2019 | 17 | 23 |
| 2020 | 18 | 13 |
| 2021 | 13 | 27 |
| 2022 | 10 | 16 |
| 2023 | 13 | 11 |
| 2024 | 11 | 12 |
| 2025 | 18 | 17 |
| 2026 | 3 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of controlling enzymatic activities and tools related thereto21 Jul 2026US 12,686,971 B2Kemira Oyj
- Xylanase variants14 Apr 2026US 12,600,960 B2AB Enzymes Finland Oy
- Modified polypeptide having xylanase activity17 Mar 2026US 12,577,598 B2
- Method for co-producing molded food-container pulp and fulvic acid from cotton stalk16 Dec 2025US 12,497,734 B2
- Fiber wash system and method25 Nov 2025US 12,480,087 B2IntegroEnergy Group, Inc.
- Process for producing rigid cellulosic product20 Aug 2026US 2026/0243023 A1Honext Material, Sl
- Chemical wood pulp with enhanced tensile strength6 Aug 2026US 2026/0226685 A1SöDra SkogsäGarna Ekonomisk FöRening
- Process for producing rigid cellulosic product30 Jul 2026US 2026/0217867 A1Honext Material, Sl
- A method for reducing the load of microbial contaminants in a pulp stock comprising a recycled fiber fraction16 Apr 2026US 2026/0103843 A1Stora Enso OYJ
- Fiber wash system and method19 Feb 2026US 2026/0049271 A1IntegroEnergy Group, Inc.
Most cited
By later US patents
- Method for increasing the accessibility of cellulose in lignocellulosic materials, particularly hardwoods agricultural residues and the like177US 4,461,648 A1984
- Modified cellulosic fibers and fibrous webs containing these fibers137US 6,146,494 AThe Procter & Gamble Company · 2000
- Enzymatic catalyzed biocide system82US 4,370,199 AWestvaco Corporation · 1983
- Production of soft paper products from old newspaper82US 5,582,681 AKimberly-Clark Corporation · 1996
- Alkaline bacillus amylase75US 5,856,164 ANovo Nordisk A/S · 1999