C07C 209/32
By reduction of nitro groups
Official title: by reduction of nitro groups
C07C209/32 (By reduction of nitro groups) appears on 466 US grants and 326 published applications in this corpus.
Search patents in C07C- Granted patents
- 466
- Published applications
- 326
- Assignees
- 234
- Inventors
- 1,196
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 11 | 0 |
| 1977 | 8 | 0 |
| 1978 | 4 | 0 |
| 1979 | 9 | 0 |
| 1980 | 11 | 0 |
| 1981 | 9 | 0 |
| 1982 | 7 | 0 |
| 1983 | 9 | 0 |
| 1984 | 4 | 0 |
| 1985 | 5 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 8 | 0 |
| 1989 | 1 | 0 |
| 1990 | 6 | 0 |
| 1991 | 9 | 0 |
| 1992 | 15 | 0 |
| 1993 | 5 | 0 |
| 1994 | 11 | 0 |
| 1995 | 6 | 0 |
| 1996 | 8 | 0 |
| 1997 | 18 | 0 |
| 1998 | 10 | 0 |
| 1999 | 13 | 0 |
| 2000 | 13 | 0 |
| 2001 | 9 | 3 |
| 2002 | 11 | 6 |
| 2003 | 5 | 16 |
| 2004 | 10 | 10 |
| 2005 | 9 | 16 |
| 2006 | 7 | 9 |
| 2007 | 7 | 10 |
| 2008 | 6 | 18 |
| 2009 | 8 | 9 |
| 2010 | 5 | 20 |
| 2011 | 9 | 9 |
| 2012 | 8 | 20 |
| 2013 | 10 | 18 |
| 2014 | 22 | 15 |
| 2015 | 19 | 25 |
| 2016 | 21 | 11 |
| 2017 | 18 | 17 |
| 2018 | 9 | 7 |
| 2019 | 13 | 11 |
| 2020 | 7 | 18 |
| 2021 | 6 | 11 |
| 2022 | 11 | 15 |
| 2023 | 11 | 7 |
| 2024 | 8 | 15 |
| 2025 | 5 | 3 |
| 2026 | 5 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Nitro compound hydrogenation reaction process and hydrogenation reaction apparatus28 Jul 2026US 12,692,219 B2China Petroleum & Chemical Corporation
- Mixed aromatic amine monomers and polymers thereof16 Jun 2026US 12,655,252 B2Exxon Mobil Technology and Engineering Company
- Catalyst system for producing aromatic amines5 May 2026US 12,616,960 B2BASF SE
- Method for reactivating a precious metal iron catalyst and performing a chemical reaction14 Apr 2026US 12,600,695 B2Dow Global Technologies LLC
- Method for the hydrogenation of aromatic nitro compounds17 Mar 2026US 12,577,194 B2Covestro Deutschland AG
- Conversion of a hydrocarbon feedstock derived from oxygen-rich biomass into aromatic isocyanates23 Jul 2026US 2026/0209166 A1Ifp Energies Nouvelles
- Synthesis methods and intermediates for the production of remimbrutinib23 Jul 2026US 2026/0209185 A1Novartis AG
- Hydrogenation process and reaction system for a hydrogenation process9 Jul 2026US 2026/0193166 A1BASF SE
- Hydrogenation process and reaction system for hydrogenation2 Jul 2026US 2026/0184666 A1BASF SE
- Membrane reactor for co-generating propene and aniline30 Apr 2026US 2026/0116840 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Process for the production of aromatic amines128US 5,877,350 ABayer Aktiengesellschaft · 1999
- Shaped hydrogenation catalyst and processes for their preparation and use93US 6,049,008 AEngelhard Corporation · 2000
- Raney nickel alloy expanded mesh hydrogenation catalysts77US 4,513,149 AOlin Corporation · 1985
- Method of preparing 4-aminodiphenylamine70US 5,117,063 AMonsanto Company · 1992
- Silica-containing shaped articles and a process for their preparation51US 4,764,498 ABayer Aktiengesellschaft · 1988