D21C 1/08
Pretreatment of the finely-divided materials before digesting: with oxygen-generating compounds
Official title: with oxygen-generating compounds
D21C1/08 (Pretreatment of the finely-divided materials before digesting: with oxygen-generating compounds) appears on 17 US grants and 15 published applications in this corpus.
Search patents in D21C- Granted patents
- 17
- Published applications
- 15
- Assignees
- 21
- Inventors
- 39
- Latest grant
- 15 Oct 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 1 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 1 | 1 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 4 | 1 |
| 2017 | 1 | 3 |
| 2018 | 1 | 1 |
| 2019 | 0 | 0 |
| 2020 | 1 | 0 |
| 2021 | 0 | 1 |
| 2022 | 0 | 3 |
| 2023 | 1 | 1 |
| 2024 | 2 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Common preparation of lignocellulosic feedstock and a product containing cellulose but free from lignin15 Oct 2024US 12,116,729 B2Lenzing Aktiengesellschaft
- Method for producing softwood-derived pulp fibers for paper and softwood-derived pulp fibers for paper23 Jan 2024US 11,879,210 B2Unicharm Corporation
- Modified sulfuric acid and uses thereof19 Sep 2023US 11,760,720 B2Sixring Inc.
- Compositions comprising parenchymal cellulose particulate material18 Feb 2020US 10,563,048 B2Cellucomp Limited
- Methods for producing raw materials from plant biomass10 Apr 2018US 9,938,663 B29Fiber, Inc.
- Modified sulfuric acid and uses thereof30 Nov 2023US 2023/0382852 A1Sixring Inc.
- Fibrous cellulose composite resin and production method therefor8 Sep 2022US 2022/0282076 A1Daio Paper Corporation
- Common preparation of lignocellulosic feedstock and a product containing cellulose but free from lignin4 Aug 2022US 2022/0243399 A1Lenzing Aktiengesellschaft
- Method for producing softwood-derived pulp fibers for paper and softwood-derived pulp fibers for paper10 Mar 2022US 2022/0074138 A1Unicharm Corporation
- Modified sulfuric acid and uses thereof2 Sep 2021US 2021/0269394 A1Sixring Inc.
Most cited
By later US patents
- Process for oxygen pulping of lignocellulosic material and recorvery of pulping chemicals96US 6,770,168 B1Kiram AB · 2004
- Process of producing high-yield pulp33US 8,268,122 B2Akzo Nobel N. V. · 2012
- Chemithermomechanical pulping process employing separate alkali and sulfite treatments22US 4,486,267 AThe Mead Corporation · 1984
- Process for the conversion of lignocellulosic material to cellulose pulp by alkaline preoxidation followed by alkaline oxygen-free digestion both in the presence of a redox additive5US 4,561,936 AMo och Domsjo Aktiebolag · 1985
- Modified sulfuric acid and uses thereof3US 11,760,720 B2Sixring Inc. · 2023