C08B 3/16
Preparation of mixed organic cellulose esters
Official title: Preparation of mixed organic cellulose esters {, e.g. cellulose aceto-formate or cellulose aceto-propionate}
C08B3/16 (Preparation of mixed organic cellulose esters) appears on 171 US grants and 216 published applications in this corpus.
Search patents in C08B- Granted patents
- 171
- Published applications
- 216
- Assignees
- 59
- Inventors
- 374
- Latest grant
- 25 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 5 | 0 |
| 1999 | 8 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 3 |
| 2004 | 2 | 5 |
| 2005 | 2 | 5 |
| 2006 | 2 | 7 |
| 2007 | 1 | 10 |
| 2008 | 2 | 9 |
| 2009 | 5 | 18 |
| 2010 | 4 | 12 |
| 2011 | 13 | 8 |
| 2012 | 8 | 18 |
| 2013 | 5 | 9 |
| 2014 | 6 | 6 |
| 2015 | 10 | 7 |
| 2016 | 7 | 8 |
| 2017 | 7 | 5 |
| 2018 | 3 | 6 |
| 2019 | 9 | 15 |
| 2020 | 6 | 16 |
| 2021 | 15 | 6 |
| 2022 | 5 | 11 |
| 2023 | 9 | 10 |
| 2024 | 7 | 6 |
| 2025 | 6 | 13 |
| 2026 | 7 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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
- Hydrophobically modified chitosan compositions2 Jun 2026US 12,643,993 B2Medcura, Inc.
- Negative electrode active material modified by zwitterionic polymer, and preparation method and applications thereof26 May 2026US 12,640,371 B2Bbl Technology Corporation
- Biodegradable compositions and articles formed therefrom24 Mar 2026US 12,583,989 B2Eastman Chemical Company
- Cellulose ester mineral particle compositions and methods of reducing the molecular weight the cellulose ester in the compositions thereof9 Apr 2026US 2026/0098103 A1Eastman Chemical Company
- Biodegradable microbeads with enhanced optical effects29 Jan 2026US 2026/0027018 A1Eastman Chemical Company
- Biodegradable cellulose ester microparticles and systems and methods for the production thereof29 Jan 2026US 2026/0027033 A1Eastman Chemical Company
- 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.
Most cited
By later US patents
- Cellulose acetate propionate96US 5,977,347 ADaicel Chemical Industries, Ltd. · 1999
- Cellulose esters and their production in carboxylated ionic liquids81US 8,148,518 B2Eastman Chemical Company · 2012
- UV curable cellulose esters55US 5,871,573 AEastman Chemical Company · 1999
- UV curable cellulose esters54US 5,981,738 AEastman Chemical Company · 1999
- UV curable cellulose esters50US 5,741,901 AEastman Chemical Company · 1998