D21C 3/263
At least one stage being in presence of oxygen
Official title: {at least one stage being in presence of oxygen}
D21C3/263 (At least one stage being in presence of oxygen) appears on 16 US grants and 12 published applications in this corpus.
Search patents in D21C- Granted patents
- 16
- Published applications
- 12
- Assignees
- 14
- Inventors
- 31
- Latest grant
- 26 Mar 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 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 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 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 | 1 | 2 |
| 2016 | 1 | 0 |
| 2017 | 1 | 2 |
| 2018 | 2 | 1 |
| 2019 | 1 | 2 |
| 2020 | 1 | 1 |
| 2021 | 2 | 0 |
| 2022 | 0 | 2 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Method for non-catalytic delignification of biomass inside an apparatus26 Mar 2024US 11,939,721 B2Lignopura Agrotech Pvt Ltd.
- Method for manufacturing dissolving pulp20 Jul 2021US 11,066,784 B2SöDra SkogsäGarna Ekonomisk FöRening
- Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same4 May 2021US 10,995,453 B2GP Cellulose GmbH
- Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same24 Mar 2020US 10,597,819 B2GP Cellulose GmbH
- Use of surfactant to treat pulp and improve the incorporation of kraft pulp into fiber for the production of viscose and other secondary fiber products10 Sep 2019US 10,407,830 B2GP Cellulose GmbH
- Pulp for paper, board or card and the provision and use thereof26 May 2022US 2022/0162802 A1Ricola Group AG
- A method for non-catalytic delignification of biomass inside an apparatus5 May 2022US 2022/0136171 A1Lignopura Agrotech Pvt Ltd.
- Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same11 Jun 2020US 2020/0181839 A1GP Cellulose GmbH
- Method for manufacturing dissolving pulp26 Dec 2019US 2019/0390404 A1SöDra SkogsäGarna Ekonomisk FöRening
- Process and apparatus for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars14 Nov 2019US 2019/0345525 A1Dsm IP Assets B.V.
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 for producing alkali pulp35US 4,274,913 AToyo Pulp Co., Ltd. · 1981
- Pulping of lignocellulosic material with oxygen in two stages at increasing pH16US 3,944,463 AMo och Domsjo Aktiebolag · 1976
- Process and apparatus for enzymatic hydrolysis of lignocellulosic material and fermentation of sugars14US 10,087,475 B2Dsm IP Assets B.V. · 2018
- Low viscosity kraft fiber having reduced yellowing properties and methods of making and using the same5US 10,000,890 B2GP Cellulose GmbH · 2018