C09K 23/50
Derivatives of lignin
C09K23/50 (Derivatives of lignin) appears on 27 US grants and 14 published applications in this corpus.
Search patents in C09K- Granted patents
- 27
- Published applications
- 14
- Assignees
- 22
- Inventors
- 64
- Latest grant
- 20 Jul 2021
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 1 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 5 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 3 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 1 |
| 2004 | 1 | 0 |
| 2005 | 1 | 0 |
| 2006 | 1 | 0 |
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 1 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 5 |
| 2019 | 0 | 2 |
| 2020 | 1 | 0 |
| 2021 | 2 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 0 | 2 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for producing alkoxylated polyphenols20 Jul 2021US 11,066,524 B2Arkema France
- Aqueous lignin and hemicellulose dispersion15 Jun 2021US 11,033,867 B2Sustainable Fiber Technologies, LLC
- Oil-in-water emulsions7 Jul 2020US 10,704,003 B2Nouryon Chemicals International B. V.
- Dispersant18 Dec 2018US 10,155,209 B2Nippon Paper Industries Co., Ltd.
- Dispersant using kraft lignin and novel lignin derivative6 Apr 2010US 7,691,982 B2Nippon Shokubai Co., Ltd.
- Nonaqueous suspensions, methods and systems for treatment of mineral slurries5 Mar 2026US 2026/0062617 A1
- Hollow spherical particle10 Jul 2025US 2025/0221940 A1Kyoto University
- Dispersion of complex scale based on elemental sulfur in acidic water30 Jan 2025US 2025/0034455 A1Solenis Technologies, L.P.
- Process for producing alkoxylated polyphenols15 Aug 2019US 2019/0248961 A1Arkema France
- Aqueous lignin and hemicellulose dispersion28 Mar 2019US 2019/0091643 A1Sustainable Fiber Technologies, LLC
Most cited
By later US patents
- Cationic bituminous emulsions and emulsion aggregate slurries30US 4,597,799 AWestvaco Corporation · 1986
- Surfactants from lignin30US 4,739,040 ATexaco Inc. · 1988
- Suspensions of particles in non-aqueous solvents29US 6,743,756 B2Benchmark Research and Technology, Inc. · 2004
- Lignin composition, method of producing the same and dispersing agent for cement used the same23US 5,811,527 ANippon Paper Industries Co., Ltd. · 1998
- Alkylated oxidized lignins as surfactants19US 4,790,382 ATexaco Inc. · 1988