C08B 17/06
Apparatus for esterification or etherification of cellulose: for making cellulose ethers
Official title: for making cellulose ethers
C08B17/06 (Apparatus for esterification or etherification of cellulose: for making cellulose ethers) appears on 13 US grants and 6 published applications in this corpus.
Search patents in C08B- Granted patents
- 13
- Published applications
- 6
- Assignees
- 9
- Inventors
- 46
- Latest grant
- 21 Mar 2023
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 2 |
| 2002 | 0 | 0 |
| 2003 | 1 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 0 |
| 2021 | 1 | 0 |
| 2022 | 0 | 0 |
| 2023 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- High-viscosity lithium carboxymethyl cellulose and preparation method therefor and application thereof21 Mar 2023US 11,608,387 B2Chongqing Lihong Fine Chemicals Co., Ltd
- Method and apparatus for controlling the catalytic oxidation of cellulose29 Jun 2021US 11,046,788 B2Upm-Kymmene Corporation
- Process and apparatus for the industrial preparation of methylhydroxyalkylcellulose23 Dec 2003US 6,667,395 B2Wolff Cellulosics GmbH & Co. KG
- Process and apparatus for making low molecular weight cellulose ethers17 Jul 2001US 6,261,218 B1The Dow Chemical Company
- Process for screening cellulose ethers31 Dec 1996US 5,589,589 AHoechst Aktiengesellschaft
- High-viscosity lithium carboxymethyl cellulose and preparation method therefor and application thereof5 Jan 2023US 2023/0002511 A1Chongqing Lihong Fine Chemicals Co., Ltd
- Method and apparatus for controlling the catalytic oxidation of cellulose7 Dec 2017US 2017/0349670 A1Upm-Kymmene Corporation
- Double-cone mixer with baffles27 Dec 2007US 2007/0297280 A1Wolff Cellulosics GmbH & Co. KG
- Process and apparatus for the industrial preparation of methylhydroxyalkylcellulose3 Apr 2003US 2003/0065166 A1Wolff Cellulosics GmbH & Co. KG
- Process for the acid-catalyzed, hydrolytic depolymerization of cellulose ethers6 Sep 2001US 2001/0020090 A1Clariant GmbH
Most cited
By later US patents
- Process and equipment for preparing swellable cross-linked carboxyalkylcelluloses from natural cellulose or cellulose hydrate and use thereof32US 4,250,306 AHoechst Aktiengesellschaft · 1981
- Apparatus for continuously producing water-soluble hydroxyalkyl cellulose and related ethers21US 4,363,784 AHoechst Aktiengesellschaft · 1982
- Continuous process for producing water-soluble hydroxyalkyl cellulose and related ethers18US 4,310,663 AHoechst Aktiengesellschaft · 1982
- Process for preparing swellable cross-linked carboxyalkylcelluloses, in the form of fibers, from cellulose hydrate and use thereof12US 4,248,595 AHoechst Aktiengesellschaft · 1981
- Reactor and its use in polysaccharide ether production10US 4,728,731 AHenkel Kommanditgesellschaft auf Aktien · 1988