C08B 3/00
Preparation of cellulose esters of organic acids
Official title: Preparation of cellulose esters of organic acids {(rendering cellulose suitable for esterification C08B1/02)}
C08B3/00 (Preparation of cellulose esters of organic acids) appears on 558 US grants and 662 published applications in this corpus.
Search patents in C08B- Granted patents
- 558
- Published applications
- 662
- Assignees
- 302
- Inventors
- 1,398
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 7 | 0 |
| 1978 | 1 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 5 | 0 |
| 1983 | 4 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 13 | 0 |
| 1992 | 6 | 0 |
| 1993 | 9 | 0 |
| 1994 | 7 | 0 |
| 1995 | 2 | 0 |
| 1996 | 8 | 0 |
| 1997 | 8 | 0 |
| 1998 | 7 | 0 |
| 1999 | 17 | 0 |
| 2000 | 6 | 0 |
| 2001 | 5 | 3 |
| 2002 | 12 | 10 |
| 2003 | 16 | 18 |
| 2004 | 8 | 17 |
| 2005 | 4 | 16 |
| 2006 | 13 | 15 |
| 2007 | 9 | 17 |
| 2008 | 8 | 18 |
| 2009 | 6 | 30 |
| 2010 | 10 | 17 |
| 2011 | 14 | 20 |
| 2012 | 10 | 33 |
| 2013 | 12 | 37 |
| 2014 | 15 | 32 |
| 2015 | 23 | 27 |
| 2016 | 23 | 39 |
| 2017 | 20 | 30 |
| 2018 | 13 | 38 |
| 2019 | 28 | 45 |
| 2020 | 27 | 32 |
| 2021 | 40 | 34 |
| 2022 | 21 | 33 |
| 2023 | 26 | 26 |
| 2024 | 23 | 25 |
| 2025 | 20 | 30 |
| 2026 | 13 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- C08B 3/06Cellulose acetate205
- C08B 3/16Preparation of mixed organic cellulose esters171
- C08B 3/22Post-esterification treatments, including purification122
- C08B 3/08Preparation of cellulose esters of organic acids: of monobasic organic acids with121
- C08B 3/14In which the organic acid residue contains substituents50
- C08B 3/12Preparation of cellulose esters of organic acids: of polybasic organic acids41
- C08B 3/20Esterification with maintenance of the fibrous structure of the cellulose32
- C08B 3/04Cellulose formate17
All 9 subgroupsShow fewer
Recent patents
- Cellulose acetate particles6 Oct 2026US 12,753,246 B2FUJIFILM Business Innovation Corp.
- Cellulose ester compositions derived from recycled Cellulose ester content syngas25 Aug 2026US 12,715,938 B2Eastman Chemical Company
- Regioselectively substituted cellulose ester based negative birefringent compensation films having improved wavelength dispersion11 Aug 2026US 12,703,774 B2Eastman Chemical Company
- Hydrophobic cellulosic fiber16 Jun 2026US 12,655,543 B2Grasim Industries Limited
- Hydrophobically modified chitosan compositions2 Jun 2026US 12,643,993 B2Medcura, Inc.
- Process for the acetylation of wood and acetylated wood17 Sep 2026US 2026/0273793 A1Titan Wood Limited
- Polymer modified nanofiber composites10 Sep 2026US 2026/0265416 A1University of Maine System Board of Trustees
- Amphiphilic cellulose derivatives, methods of making, and uses thereof27 Aug 2026US 2026/0250426 A1Purdue Research Foundation
- Method for producing long chain cellulose ester, long chain cellulose ester and its use13 Aug 2026US 2026/0234292 A1Kemira Oyj
- Blended cellulose acetate fiber and process for the making thereof13 Aug 2026US 2026/0234837 A1Eastman Chemical Company
Most cited
By later US patents
- Biodegradable oxidized cellulose esters140US 7,662,801 B2University of Iowa Research Foundation · 2010
- Biodegradable oxidized cellulose esters136US 7,595,392 B2University of Iowa Research Foundation · 2009
- Biodegradable oxidized cellulose esters and their uses as microspheres131US 7,649,089 B2University of Iowa Research Foundation · 2010
- Aldehyde-modified cellulosic fibers for paper products having high initial wet strength109US 5,698,688 AThe Procter & Gamble Company · 1997
- Cellulose acetate propionate96US 5,977,347 ADaicel Chemical Industries, Ltd. · 1999