C08B 3/26
Isolation of the cellulose ester
C08B3/26 (Isolation of the cellulose ester) appears on 17 US grants and 18 published applications in this corpus.
Search patents in C08B- Granted patents
- 17
- Published applications
- 18
- Assignees
- 11
- Inventors
- 51
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 3 |
| 2017 | 1 | 1 |
| 2018 | 0 | 1 |
| 2019 | 2 | 3 |
| 2020 | 2 | 1 |
| 2021 | 1 | 2 |
| 2022 | 0 | 1 |
| 2023 | 1 | 1 |
| 2024 | 1 | 0 |
| 2025 | 1 | 3 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Cellulose acetate and method for producing cellulose acetate1 Jul 2025US 12,344,681 B2Daicel Corporation
- Cellulose-containing materials9 Jan 2024US 11,866,519 B2Wool Research Organisation of New Zealand, Inc.
- Cellulose resin, molding material, molded body, and method for producing cellulose resin7 Feb 2023US 11,572,416 B2NEC Corporation
- Acylation process12 Jan 2021US 10,889,654 B2SOLVAY ACETOW GmbH
- Nutrient composition having lipid metabolism-improving action22 Dec 2020US 10,869,883 B2Daicel Corporation
- Hydroxypropyl methylcellulose acetate succinate and method for producing hydroxypropyl methylcellulose acetate succinate27 Nov 2025US 2025/0361327 A1Shin-Etsu Chemical Co., Ltd.
- Method for producing hydroxypropyl methylcellulose acetate succinate20 Nov 2025US 2025/0353932 A1Shin-Etsu Chemical Co., Ltd.
- Hydroxypropyl methylcellulose acetate succinate and method for producing same20 Nov 2025US 2025/0353933 A1Shin-Etsu Chemical Co., Ltd.
- Cellulose-containing materials26 Oct 2023US 2023/0340161 A1
- Cellulose acetate and method for producing cellulose acetate21 Jul 2022US 2022/0227891 A1Daicel Corporation
Most cited
By later US patents
- Process for making cellulose ester microparticles46US 5,047,180 AHoechst Celanese Corporation · 1991
- Water soluble cellulose acetate microspheres15US 4,888,420 ACelanese Fibers, Inc. · 1989
- Cellulose ester microparticles and process for making the same13US 5,064,949 AHoechst Celanese Corporation · 1991
- Direct precipitation method for producing extrusion-grade cellulose acetate powder and resulting product10US 4,228,276 AEastman Kodak Company · 1980
- Preparation of water soluble cellulose acetate microspheres4US 4,997,599 ACelanese Fibers, Inc. · 1991