D21C 3/026
In presence of o2
Official title: {in presence of O2, e.g. air}
D21C3/026 (In presence of o2) appears on 24 US grants and 19 published applications in this corpus.
Search patents in D21C- Granted patents
- 24
- Published applications
- 19
- Assignees
- 29
- Inventors
- 66
- Latest grant
- 7 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 2 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
| 2004 | 0 | 2 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 1 | 2 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 1 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 0 | 1 |
| 2025 | 4 | 0 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Process and apparatus for white liquor oxidation9 Sep 2025US 12,410,557 B2Messer Austria GmbH
- Processes and systems for biomass impregnation to improve conversion to sugars, chemicals, fuels, and materials15 Jul 2025US 12,359,371 B2GranBio Intellectual Property Holdings, LLC
- Method for preparing fluff pulp from bamboos and fluff pulp prepared thereby29 Apr 2025US 12,286,750 B2South China University of Technology
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- Processes and systems for biomass impregnation to improve conversion to sugars, chemicals, fuels, and materials8 Jan 2026US 2026/0009178 A1GranBio Intellectual Property Holdings, LLC
- Method for preparing fluff pulp from bamboos and fluff pulp prepared thereby3 Oct 2024US 2024/0328083 A1South China University of Technology
- Process and apparatus for white liquor oxidation5 Oct 2023US 2023/0313456 A1Messer Austria GmbH
- High yield chemical pulping and bleaching process24 Aug 2023US 2023/0265609 A1GPCP IP Holdings LLC
Most cited
By later US patents
- Method of treating lignocellulosic biomass to produce cellulose109US 6,419,788 B1PureVision Technology, Inc. · 2002
- Cellulose production from lignocellulosic biomass93US 6,620,292 B2PureVision Technology, Inc. · 2003
- High-yield chemical pulping41US 4,869,783 AThe Mead Corporation · 1989
- Oxygen pulping with recycled liquor35US 4,248,662 AThe Black Clawson Company · 1981
- Process for obtaining seed hull commodities including cellulosic fibers and xylitol22US 4,087,316 ACotton Incorporated · 1978