C08B 11/20
Post-etherification treatments of chemical or physical type
Official title: Post-etherification treatments of chemical or physical type, {e.g. mixed etherification in two steps}, including purification
C08B11/20 (Post-etherification treatments of chemical or physical type) appears on 303 US grants and 287 published applications in this corpus.
Search patents in C08B- Granted patents
- 303
- Published applications
- 287
- Assignees
- 139
- Inventors
- 730
- Latest grant
- 10 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 3 | 0 |
| 1981 | 5 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 3 | 0 |
| 1985 | 4 | 0 |
| 1986 | 3 | 0 |
| 1987 | 7 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 10 | 0 |
| 1991 | 5 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 4 | 0 |
| 1995 | 1 | 0 |
| 1996 | 12 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 5 | 0 |
| 2000 | 11 | 0 |
| 2001 | 8 | 10 |
| 2002 | 6 | 9 |
| 2003 | 20 | 19 |
| 2004 | 3 | 12 |
| 2005 | 12 | 15 |
| 2006 | 8 | 12 |
| 2007 | 6 | 11 |
| 2008 | 4 | 11 |
| 2009 | 2 | 5 |
| 2010 | 3 | 7 |
| 2011 | 5 | 10 |
| 2012 | 4 | 5 |
| 2013 | 9 | 15 |
| 2014 | 5 | 23 |
| 2015 | 13 | 25 |
| 2016 | 22 | 19 |
| 2017 | 13 | 6 |
| 2018 | 9 | 11 |
| 2019 | 5 | 6 |
| 2020 | 13 | 13 |
| 2021 | 5 | 12 |
| 2022 | 10 | 10 |
| 2023 | 8 | 6 |
| 2024 | 4 | 1 |
| 2025 | 2 | 11 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cellulose ethers with delayed solubility and having a reduced glyoxal content10 Mar 2026US 12,570,768 B2SE Tylose GmbH & Co. KG
- Process for producing a crosslinked cellulose ether30 Sep 2025US 12,428,498 B2Dow Global Technologies LLC
- Synthesis of a biocompatible, biodegradable, and tunable shape memory polymer triggered at body temperature14 Jan 2025US 12,195,587 B2
- Amphiphilic polysaccharides, polysaccharide-based hydrogels, and methods of manufacture10 Dec 2024US 12,162,962 B2Purdue Research Foundation
- Method for producing depolymerized cellulose ether25 Jun 2024US 12,018,098 B2Shin-Etsu Chemical Co., Ltd.
- Low viscosity cm-mfc17 Sep 2026US 2026/0274998 A1Suzano S.A.
- Method to reduce alkoxy ether release from cellulose ethers27 Aug 2026US 2026/0250427 A1
- Cellulose-based absorbent material and process for its production9 Apr 2026US 2026/0097389 A1Teknologian tutkimuskeskus VTT Oy
- Water-soluble, biodegradable dihydroxyalkyl cellulose25 Dec 2025US 2025/0388705 A1ISP Investments Inc.
- Hydroxypropyl methylcellulose acetate succinate and method for producing hydroxypropyl methylcellulose acetate succinate27 Nov 2025US 2025/0361327 A1Shin-Etsu Chemical Co., Ltd.
Most cited
By later US patents
- Crosslinked carboxy polysaccharides154US 5,676,964 AFidia S.p.A. · 1997
- Single phase gels for the prevention of adhesions152US 6,521,223 B1Genzyme Corporation · 2003
- Compositions of polyacids and polyethers and methods for their use in reducing adhesions142US 6,869,938 B1FzioMed, Inc. · 2005
- Fracturing of subterranean formations101US 4,683,068 ADowell Schlumberger Incorporated · 1987
- Derivatized microfibrillar polysaccharide83US 6,602,994 B1Hercules Incorporated · 2003