C08B 5/00
Preparation of cellulose esters of inorganic acids
Official title: Preparation of cellulose esters of inorganic acids {, e.g. phosphates (rendering cellulose suitable for esterification C08B1/02)}
C08B5/00 (Preparation of cellulose esters of inorganic acids) appears on 134 US grants and 147 published applications in this corpus.
Search patents in C08B- Granted patents
- 134
- Published applications
- 147
- Assignees
- 109
- Inventors
- 379
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 4 | 0 |
| 1978 | 4 | 0 |
| 1979 | 5 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 5 |
| 2004 | 1 | 2 |
| 2005 | 2 | 3 |
| 2006 | 1 | 4 |
| 2007 | 1 | 6 |
| 2008 | 0 | 1 |
| 2009 | 0 | 6 |
| 2010 | 3 | 5 |
| 2011 | 4 | 5 |
| 2012 | 3 | 0 |
| 2013 | 2 | 4 |
| 2014 | 6 | 5 |
| 2015 | 3 | 8 |
| 2016 | 3 | 6 |
| 2017 | 4 | 3 |
| 2018 | 4 | 8 |
| 2019 | 2 | 9 |
| 2020 | 7 | 11 |
| 2021 | 10 | 18 |
| 2022 | 6 | 11 |
| 2023 | 10 | 6 |
| 2024 | 6 | 5 |
| 2025 | 0 | 10 |
| 2026 | 4 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fibrous cellulose, fibrous cellulose dispersion, and fibrous cellulose production method16 Jun 2026US 12,655,233 B2Oji Holdings Corporation
- Phosphorus-containing cellulose esters, methods for their preparation, their use, and flame retardants12 May 2026US 12,624,125 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Fine fibrous cellulose, dispersed solution, sheet, laminated sheet, laminate, and method for producing fine fibrous cellulose17 Feb 2026US 12,553,185 B2Oji Holdings Corporation
- Modified cellulose and the preparation method and application thereof20 Jan 2026US 12,528,884 B2Zhejiang Sci-Tech University
- Nanostructures from laser-ablated nanohole templates8 Oct 2024US 12,109,737 B2Ultra Small Fibers, LLC
- Thiol-functionalized cellulose nanocrystals for applications in rubber30 Jul 2026US 2026/0217950 A1Compagnie Generale Des Etablissements Michelin
- Cellulose fine fiber composition, aqueous dispersion of cellulose fine fiber, polymer composition, molded article and method for producing cellulose fine fiber composition23 Jul 2026US 2026/0209392 A1Yokogawa Electric Corporation
- Fine fibrous cellulose, dispersed solution, sheet, laminated sheet, laminate, and method for producing fine fibrous cellulose9 Jul 2026US 2026/0193842 A1Oji Holdings Corporation
- Sulfonated nanocellulose film with high proton conductivity and preparation method therefor2 Jul 2026US 2026/0184821 A1Shaanxi University of Science and Technology
- Synthesis and characterization of glycosaminoglycan mimetic variants to promote chondrogenesis4 Jun 2026US 2026/0151533 A1New Jersey Institute of Technology
Most cited
By later US patents
- Sulfonated polymers and method of sulfonating polymers46US 5,798,078 AKimberly-Clark Worldwide, Inc. · 1998
- Process for producing a regenerated hollow cellulosic fiber41US 4,086,418 AInternational Telephone and Telegraph Corporation · 1978
- Sulfonated polymers40US 6,114,407 AKimberly-Clark Worldwide, Inc. · 2000
- Sulphated ion exchanger and method for preparation thereof36US 4,178,439 ADevelopment Finance Corporation of New Zealand · 1979
- Cellulose and cellulose products modified by silicic acid35US 4,033,913 A1977