C07C 37/54
By hydrolysis of lignin or sulfite waste liquor
Official title: by hydrolysis of lignin or sulfite waste liquor
C07C37/54 (By hydrolysis of lignin or sulfite waste liquor) appears on 21 US grants and 32 published applications in this corpus.
Search patents in C07C- Granted patents
- 21
- Published applications
- 32
- Assignees
- 24
- Inventors
- 93
- Latest grant
- 15 Apr 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 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 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 2 |
| 2012 | 0 | 1 |
| 2013 | 0 | 7 |
| 2014 | 2 | 1 |
| 2015 | 3 | 4 |
| 2016 | 3 | 5 |
| 2017 | 4 | 2 |
| 2018 | 2 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 2 | 3 |
| 2023 | 0 | 3 |
| 2024 | 0 | 2 |
| 2025 | 1 | 0 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of depolymerising phenolic polymers15 Apr 2025US 12,275,697 B2Stellenbosch University
- Method for preparation of 2,5-dimethylphenol by selective catalytic conversion of lignin13 Dec 2022US 11,524,928 B2Anhui University of Science and Technology
- Methods for lignin depolymerization using thiols8 Mar 2022US 11,267,838 B2Board of Trustees of Michigan State University
- Method of depolymerizing lignin6 Aug 2019US 10,370,315 B2Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Systems and methods for the depolymerization of a biopolymer28 Aug 2018US 10,059,650 B2Yale University
- Method for producing lignin decomposition product, method for producing methanol, and lignin-based composition17 Sep 2026US 2026/0274776 A1Kyushu University, National University Corporation
- Solvolysis process19 Dec 2024US 2024/0417628 A1Upm-Kymmene Corporation
- Method for the selective cleavage of a compound comprising an aromatic ring and a c-o-c linkage8 Feb 2024US 2024/0043626 A1Centrale Lille Institut
- Methods for electroreductive lignin depolymerization28 Dec 2023US 2023/0416289 A1Board of Trustees of Michigan State University
- A method for co-producing monophenols and cellulose by catalytic oxidation of biomass over a transition metal oxide19 Jan 2023US 2023/0021045 A1Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences
Most cited
By later US patents
- Lignin hydrocracking process to produce phenol and benzene51US 4,420,644 AHydrocarbon Research, Inc. · 1983
- Lignin cracking process using fast fluidized bed reactions22US 4,409,416 A1983
- Process for liquefaction of lignin12US 4,731,491 AUop LLC · 1988
- Method for the integrated production of cellulose and low-molecular-weight reusable materials7US 8,853,478 B2BASF SE · 2014
- One-step conversion of solid lignin to liquid products2US 8,673,027 B2Bergen Teknologioverforing AS · 2014