D21C 3/18
Pulping cellulose-containing materials: with halogens or halogen-generating compounds
Official title: with halogens or halogen-generating compounds (bleaching cellulose pulp D21C9/12)
D21C3/18 (Pulping cellulose-containing materials: with halogens or halogen-generating compounds) appears on 17 US grants and 21 published applications in this corpus.
Search patents in D21C- Granted patents
- 17
- Published applications
- 21
- Assignees
- 15
- Inventors
- 47
- Latest grant
- 30 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
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| 2001 | 0 | 0 |
| 2002 | 1 | 1 |
| 2003 | 1 | 0 |
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| 2005 | 0 | 0 |
| 2006 | 0 | 2 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 2 |
| 2014 | 2 | 3 |
| 2015 | 1 | 3 |
| 2016 | 2 | 0 |
| 2017 | 1 | 2 |
| 2018 | 0 | 1 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 0 | 1 |
| 2022 | 1 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Lignin removal from lignocellulosic waste using rejected brine solution30 Sep 2025US 12,428,783 B1United Arab Emirates University
- Method of producing resin modifier, resin modifier, and composite material6 Feb 2024US 11,891,501 B2The University of Tokyo
- Fiber production with supercritical fluid phase from cotton straw25 Oct 2022US 11,479,913 B2
- Continuous process for production of cellulose pulp from grass-like plant feedstock3 Oct 2017US 9,777,429 B2
- Method for producing cellulose nanofibers14 Jun 2016US 9,365,973 B2Nippon Paper Industries Co., Ltd.
- Manufacture of dissolving pulp grade cellulose25 Jun 2026US 2026/0176817 A1Sixring Inc.
- Lignin removal from lignocellulosic waste using rejected brine solution2 Oct 2025US 2025/0305214 A1United Arab Emirates University
- Method of producing resin modifier, resin modifier, and composite material16 Jun 2022US 2022/0186015 A1The University of Tokyo
- Fiber production with supercritical fluid phase from cotton straw10 Jun 2021US 2021/0172117 A1Veritas Tekstil Konfeksiyon Pazarlama Sanayi Ve Ticaret Anonim Sirketi
- Stable and homogenous anthraquinone compositions and preparations thereof15 Feb 2018US 2018/0044853 A1Cargill, Incorporated
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
- Process for preparing cellulose23US 4,307,121 A1981
- Process for preparing cellulose17US 4,486,459 A1984
- Cellulose food product and products resulting therefrom7US 4,599,240 A1986