C07C 41/56
By condensation of aldehydes, paraformaldehyde, or ketones
Official title: by condensation of aldehydes, paraformaldehyde, or ketones
C07C41/56 (By condensation of aldehydes, paraformaldehyde, or ketones) appears on 126 US grants and 78 published applications in this corpus.
Search patents in C07C- Granted patents
- 126
- Published applications
- 78
- Assignees
- 96
- Inventors
- 327
- Latest grant
- 24 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 4 | 0 |
| 1979 | 6 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 3 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 3 | 0 |
| 2000 | 8 | 0 |
| 2001 | 5 | 1 |
| 2002 | 5 | 2 |
| 2003 | 4 | 4 |
| 2004 | 2 | 5 |
| 2005 | 1 | 0 |
| 2006 | 2 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 5 |
| 2009 | 3 | 2 |
| 2010 | 7 | 5 |
| 2011 | 0 | 5 |
| 2012 | 5 | 1 |
| 2013 | 0 | 2 |
| 2014 | 4 | 8 |
| 2015 | 7 | 6 |
| 2016 | 8 | 4 |
| 2017 | 3 | 3 |
| 2018 | 3 | 1 |
| 2019 | 3 | 4 |
| 2020 | 1 | 3 |
| 2021 | 4 | 2 |
| 2022 | 2 | 3 |
| 2023 | 0 | 4 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
| 2026 | 1 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for preparing indene acryladehyde derivatives24 Mar 2026US 12,583,809 B2Firmenich SA
- Method for producing polyoxymethylene dimethyl ethers27 May 2025US 12,312,303 B2Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
- Upgrading of a raw blend into a diesel fuel substitute: poly(dimethoxymethane)21 May 2024US 11,986,793 B2Gas Technologies LLC
- Method for producing alpha-allylated cycloalkanone13 Dec 2022US 11,524,929 B2Kao Corporation
- Etherification process18 Oct 2022US 11,472,759 B2Bp P.L.C.
- Processes for the preparation of citral and interrelated products24 Sep 2026US 2026/0285794 A1BASF SE
- A process for preparing 2,2-dimethoxypropane17 Sep 2026US 2026/0274778 A1Aditya Birla Chemicals (Thailand) Ltd.
- Method for producing glycolaldehyde dialkyl acetal10 Jul 2025US 2025/0223252 A1Toyota Jidosha Kabushiki Kaisha
- Method for producing trioxane or methylal26 Dec 2024US 2024/0425472 A1Asahi Kasei Kabushiki Kaisha
- Method for producing polyoxymethylene dimethyl ethers7 Sep 2023US 2023/0278943 A1Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e. V.
Most cited
By later US patents
- Manufacture of alcohols64US 7,700,814 B2ExxonMobil Chemical Patents Inc. · 2010
- Ethanamine derivatives their preparation and use in pharmaceutical compositions50US 4,338,333 ABeecham Group Limited · 1982
- Process for producing acetaldehyde dimethylacetal33US 5,362,918 AShowa Denko K. K. · 1994
- Process for preparing acetaldehyde diethyl acetal32US 5,527,969 AHuels Aktiengesellschaft · 1996
- Manufacture of purified alcohols31US 8,288,596 B2ExxonMobil Chemical Patents Inc. · 2012