D21C 11/005
Treatment of liquors with ion-exchangers
Official title: {Treatment of liquors with ion-exchangers}
D21C11/005 (Treatment of liquors with ion-exchangers) appears on 11 US grants and 10 published applications in this corpus.
Search patents in D21C- Granted patents
- 11
- Published applications
- 10
- Assignees
- 11
- Inventors
- 39
- Latest grant
- 23 Apr 2024
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 3 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 4 |
| 2016 | 0 | 0 |
| 2017 | 4 | 2 |
| 2018 | 1 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 1 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 1 | 0 |
By publication year. Applications have been published since 2001.
Recent patents
- Methods for treating lignocellulosic materials23 Apr 2024US 11,965,220 B2Virdia, Inc.
- Methods for treating lignocellulosic materials6 Jul 2021US 11,053,558 B2Virdia, Inc.
- Detoxifying and recycling of washing solution used in pretreatment of lignocellulose-containing materials11 Sep 2018US 10,072,380 B2Cofco LTD
- Methods for treating lignocellulosic materials10 Oct 2017US 9,783,861 B2Virdia, Inc.
- Detoxifying and recycling of washing solution used in pretreatment of lignocellulose-containing materials4 Jul 2017US 9,695,549 B2Cofco LTD
- Processes for extracting lignin from black liquor13 Oct 2022US 2022/0324894 A1Suzano S.A.
- Methods for treating lignocellulosic materials23 Sep 2021US 2021/0292858 A1Virdia, Inc.
- Methods for treating lignocellulosic materials7 Dec 2017US 2017/0349958 A1Virdia, Inc.
- Detoxifying and recycling of washing solution used in pretreatment of lignocellulose-containing materials10 Aug 2017US 2017/0226694 A1Cofco LTD
- Methods for treating lignocellulosic materials28 May 2015US 2015/0144126 A1Virdia, Inc.
Most cited
By later US patents
- Electrodialylic water splitting process for the treatment of aqueous electrolytes19US 5,006,211 APulp and Paper Research Institute of Canada · 1991
- Methods for treating lignocellulosic materials11US 9,650,687 B2Virdia, Inc. · 2017
- Methods for treating lignocellulosic materials11US 9,783,861 B2Virdia, Inc. · 2017
- Method and apparatus for removing sodium chloride from pulping chemicals using an amphoteric ion-exchange resin5US 5,922,171 AEco-Tec Limited · 1999
- Recovery process in a pulp mill3US 5,980,717 AEka Chemical AB · 1999