C08B 9/00
Cellulose xanthate
Official title: Cellulose xanthate; Viscose {(formation of films C08J5/18; formation of fibres D01F; rendering cellulose suitable for esterification C08B1/02)}
C08B9/00 (Cellulose xanthate) appears on 47 US grants and 34 published applications in this corpus.
Search patents in C08B- Granted patents
- 47
- Published applications
- 34
- Assignees
- 42
- Inventors
- 114
- Latest grant
- 17 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 2 | 0 |
| 1978 | 1 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 3 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 1 |
| 2007 | 1 | 0 |
| 2008 | 1 | 2 |
| 2009 | 0 | 3 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 2 | 5 |
| 2014 | 3 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 1 | 2 |
| 2018 | 1 | 2 |
| 2019 | 3 | 1 |
| 2020 | 1 | 2 |
| 2021 | 2 | 3 |
| 2022 | 1 | 1 |
| 2023 | 1 | 2 |
| 2024 | 3 | 4 |
| 2025 | 0 | 1 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Fine fibrous cellulose, dispersed solution, sheet, laminated sheet, laminate, and method for producing fine fibrous cellulose17 Feb 2026US 12,553,185 B2Oji Holdings Corporation
- Use of ethoxylated fatty amido alcohols as a reactivity additive in the process wherein cellulose is reacted with lye13 Aug 2024US 12,060,442 B2Nouryon Chemicals International B. V.
- Method of pulping cotton-based raw material26 Mar 2024US 11,939,405 B2Lenzing Aktiengesellschaft
- Recycling of cellulosic textiles6 Feb 2024US 11,891,725 B2Re:Newcell AB
- Recycling of cellulosic textiles4 Apr 2023US 11,618,978 B2Re:Newcell AB
- Fine fibrous cellulose, dispersed solution, sheet, laminated sheet, laminate, and method for producing fine fibrous cellulose9 Jul 2026US 2026/0193842 A1Oji Holdings Corporation
- Biocidal and photoluminescent treatment of viscose fibre immediately following the addition of carbon disulfide in the conversion of cellulose into viscose (xanthation)10 Jul 2025US 2025/0223728 A1Ancor TecnolóGica Canaria, S.L.
- A method of recycling textile waste cellulose22 Aug 2024US 2024/0279424 A1Asia Pacific Resources International Holdings Ltd.
- Method of pulping cotton-based raw material20 Jun 2024US 2024/0199765 A1Lenzing Aktiengesellschaft
- Dissolution method30 May 2024US 2024/0174769 A1Futamura Chemical UK Ltd.
Most cited
By later US patents
- Viscose product35US 7,390,566 B2Weyerhaeuser Company · 2008
- Pulp treatment and process24US 7,267,744 B2Sappi Limited · 2007
- Recycling of dyed cellulosic waste15US 5,609,676 AHoechst Aktiengesellschaft · 1997
- Process for preparing cellulose derivatives11US 4,410,693 AThe Dow Chemical Company · 1983
- Viscose rayon spinning machine11US 4,477,951 AFiber Associates, Inc. · 1984