C08B 3/22
Post-esterification treatments, including purification
C08B3/22 (Post-esterification treatments, including purification) appears on 122 US grants and 104 published applications in this corpus.
Search patents in C08B- Granted patents
- 122
- Published applications
- 104
- Assignees
- 69
- Inventors
- 314
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 5 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 6 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 5 | 0 |
| 1998 | 0 | 0 |
| 1999 | 2 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 3 |
| 2003 | 4 | 6 |
| 2004 | 2 | 4 |
| 2005 | 3 | 8 |
| 2006 | 4 | 5 |
| 2007 | 6 | 0 |
| 2008 | 3 | 2 |
| 2009 | 0 | 4 |
| 2010 | 2 | 2 |
| 2011 | 1 | 3 |
| 2012 | 1 | 4 |
| 2013 | 2 | 12 |
| 2014 | 3 | 3 |
| 2015 | 8 | 5 |
| 2016 | 5 | 6 |
| 2017 | 2 | 3 |
| 2018 | 0 | 4 |
| 2019 | 4 | 4 |
| 2020 | 4 | 3 |
| 2021 | 4 | 6 |
| 2022 | 0 | 2 |
| 2023 | 2 | 4 |
| 2024 | 5 | 5 |
| 2025 | 2 | 5 |
| 2026 | 2 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fibrous cellulose, fibrous cellulose composite resin, and method for manufacturing fibrous cellulose24 Feb 2026US 12,559,578 B2Daio Paper Corporation
- Cellulose nanocrystal-based emulsions and uses thereof10 Feb 2026US 12,543,730 B2Board of Trustees of the University of Arkansas
- Cellulose acetate and method for producing cellulose acetate1 Jul 2025US 12,344,681 B2Daicel Corporation
- Cellulosic particle10 Jun 2025US 12,325,779 B2FUJIFILM Business Innovation Corp.
- Manufacture of nanocellulose and intermediates thereof9 Jul 2024US 12,030,960 B2Finecellox AB
- 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.
- Method for manufacturing cellulose nanocrystals26 Jun 2025US 2025/0206848 A1Centre National De La Recherche Scientifique
- Compositions and methods related functionalized cellulose nanofibrils12 Jun 2025US 2025/0188196 A1The Regents of the University of California
Most cited
By later US patents
- Aldehyde-modified cellulosic fibers for paper products having high initial wet strength109US 5,698,688 AThe Procter & Gamble Company · 1997
- Carboxylated cellulose ester and manufacture thereof95US 4,590,265 AEastman Kodak Company · 1986
- Cellulose ester fibrillar structure51US 4,047,862 ACelanese Corporation · 1977
- Acid-curable cellulose esters containing melamine pendent groups47US 5,182,379 AEastman Kodak Company · 1993
- Process for making cellulose ester microparticles46US 5,047,180 AHoechst Celanese Corporation · 1991