B01J 2231/326
Diels-alder or other [4+2] cycloadditions
Official title: Diels-Alder or other [4+2] cycloadditions, e.g. hetero-analogues
B01J2231/326 (Diels-alder or other [4+2] cycloadditions) appears on 79 US grants and 59 published applications in this corpus.
Search patents in B01J- Granted patents
- 79
- Published applications
- 59
- Assignees
- 51
- Inventors
- 148
- Latest grant
- 24 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 2 | 0 |
| 2001 | 7 | 2 |
| 2002 | 10 | 7 |
| 2003 | 6 | 4 |
| 2004 | 2 | 7 |
| 2005 | 5 | 6 |
| 2006 | 2 | 4 |
| 2007 | 3 | 2 |
| 2008 | 4 | 0 |
| 2009 | 2 | 5 |
| 2010 | 3 | 2 |
| 2011 | 1 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 3 |
| 2014 | 2 | 1 |
| 2015 | 2 | 0 |
| 2016 | 3 | 2 |
| 2017 | 1 | 1 |
| 2018 | 2 | 2 |
| 2019 | 1 | 1 |
| 2020 | 1 | 2 |
| 2021 | 3 | 3 |
| 2022 | 1 | 2 |
| 2023 | 1 | 0 |
| 2024 | 1 | 2 |
| 2025 | 0 | 0 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Air-stable ni(0)-olefin complexes and their use as catalysts or precatalysts24 Feb 2026US 12,558,677 B2Studiengesellschaft Kohle mbH
- Strongly Lewis acidic metal-organic frameworks for continuous flow catalysis23 Jul 2024US 12,042,788 B2The University of Chicago
- Swellable organically modified silica as nanoreactors19 Dec 2023US 11,845,055 B2Appalachian State University
- Compound of 3,3,3′,3′-tetramethyl-1,1′-spirobiindane-based phosphine ligand, and preparation method thereof20 Dec 2022US 11,530,230 B2Zhejiang University
- Catalyst composition for a production process of δ-lactone from carbon dioxide and 1,3-butadiene23 Nov 2021US 11,179,709 B2PTT Global Chemical Public Company Limited
- Manufacturing 2,3,5-trimethylhydroquinone from a mixture of mesitol and 2,3,6-trimethylphenol20 Aug 2026US 2026/0242317 A1Dsm IP Assets B.V.
- Perfluorinated amide salts and their uses as ionic conducting materials1 Aug 2024US 2024/0253023 A1
- Organo-phosphate modified metal organic frameworks and applications2 May 2024US 2024/0139722 A1
- Air-stable ni(0)-olefin complexes and their use as catalysts or precatalysts25 Aug 2022US 2022/0266232 A1Studiengesellschaft Kohle mbH
- Swellable Organically Modified Silica as Nanoreactors13 Jan 2022US 2022/0008887 A1Appalachian State University
Most cited
By later US patents
- Perfluorinated amide salts and their uses as ionic conducting materials61US 6,319,428 B1Centre National De La Recherche Scientifique · 2001
- Asymmetric syntheses48US 5,360,938 AUnion Carbide Chemicals & Plastics Technology Corporation · 1994
- Diolefin dimerization catalyst and method for producing nitrosyl halides of iron triad metals45US 4,234,454 APhillips Petroleum Company · 1980
- Asymmetric syntheses36US 5,491,266 AUnion Carbide Chemicals & Plastics Technology Corporation · 1996
- Proton conductors in liquid form34US 6,120,696 ACentre National De La Recherche Scientifique · 2000