C07C 51/255
Of compounds containing six-membered aromatic rings without ring-splitting
Official title: of compounds containing six-membered aromatic rings without ring-splitting
C07C51/255 (Of compounds containing six-membered aromatic rings without ring-splitting) appears on 767 US grants and 434 published applications in this corpus.
Search patents in C07C- Granted patents
- 767
- Published applications
- 434
- Assignees
- 247
- Inventors
- 1,376
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 16 | 0 |
| 1977 | 15 | 0 |
| 1978 | 10 | 0 |
| 1979 | 11 | 0 |
| 1980 | 28 | 0 |
| 1981 | 18 | 0 |
| 1982 | 21 | 0 |
| 1983 | 10 | 0 |
| 1984 | 11 | 0 |
| 1985 | 11 | 0 |
| 1986 | 11 | 0 |
| 1987 | 8 | 0 |
| 1988 | 21 | 0 |
| 1989 | 31 | 0 |
| 1990 | 20 | 0 |
| 1991 | 21 | 0 |
| 1992 | 21 | 0 |
| 1993 | 20 | 0 |
| 1994 | 10 | 0 |
| 1995 | 9 | 0 |
| 1996 | 13 | 0 |
| 1997 | 11 | 0 |
| 1998 | 15 | 0 |
| 1999 | 18 | 0 |
| 2000 | 19 | 0 |
| 2001 | 18 | 7 |
| 2002 | 30 | 24 |
| 2003 | 24 | 19 |
| 2004 | 11 | 17 |
| 2005 | 6 | 19 |
| 2006 | 18 | 45 |
| 2007 | 9 | 33 |
| 2008 | 22 | 30 |
| 2009 | 32 | 32 |
| 2010 | 19 | 28 |
| 2011 | 34 | 22 |
| 2012 | 16 | 19 |
| 2013 | 13 | 16 |
| 2014 | 11 | 16 |
| 2015 | 34 | 28 |
| 2016 | 23 | 16 |
| 2017 | 11 | 7 |
| 2018 | 9 | 11 |
| 2019 | 8 | 5 |
| 2020 | 8 | 8 |
| 2021 | 2 | 5 |
| 2022 | 1 | 2 |
| 2023 | 4 | 6 |
| 2024 | 0 | 5 |
| 2025 | 1 | 4 |
| 2026 | 4 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Co-production of monomers, including at least one bio-based monomer28 Jul 2026US 12,692,217 B2Archer Daniels Midland Company
- Preparation of aromatic carbonyl compounds by catalytic oxidation with molecular oxygen24 Mar 2026US 12,583,828 B2BASF SE
- Process for recovering oxidation by-products17 Mar 2026US 12,577,193 B2Ineos US Chemicals Company
- Production of aromatic acids and phenolics20 Jan 2026US 12,528,758 B2Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO
- Built-in micro-interface oxidation system and method for preparing terephthalic acid from p-xylene1 Jul 2025US 12,344,579 B2Nanjing Yanchang Reaction Technology Research Institute Co., Ltd.
- Methods for producing phenolic compounds including syringol from biomass and using same for 3d printing28 May 2026US 2026/0146014 A1Align Technology, Inc.
- Process and apparatus of production of aromatic dicarboxylic acid14 May 2026US 2026/0132248 A1Ineos US Chemicals Company
- Upcycling waste polystyrene to adipic acid through a hybrid chemical and biological process30 Apr 2026US 2026/0117039 A1Alliance for Energy Innovation, LLC
- Recycled content paraxylene from waste plastic16 Apr 2026US 2026/0103562 A1Eastman Chemical Company
- Recycled content hydrocarbon from a resin facility to recycled content paraxylene19 Feb 2026US 2026/0049253 A1Eastman Chemical Company
Most cited
By later US patents
- Process for the production of fiber-grade terephthalic acid129US 4,158,738 AE. I. Du Pont de Nemours and Company · 1979
- Process for producing terephthalic acid by catalytic liquid phase oxidation of para-xylene124US 3,996,271 AMitsui Petrochemical Industries, Ltd. · 1976
- Process for producing highly purified benzenedicarboxylic acid isomers91US 5,359,133 AJoint-Stock Company of Research and Design Institute of Monomers (AO NIPIM) · 1994
- Non-aged inorganic oxide-containing aerogels and their preparation88US 4,619,908 AStauffer Chemical Company · 1986
- Production of terephthalic acid84US 6,307,099 B1E. I. Du Pont de Nemours and Company · 2001