C07C 31/20
Dihydroxylic alcohols
C07C31/20 (Dihydroxylic alcohols) appears on 310 US grants and 325 published applications in this corpus.
Search patents in C07C- Granted patents
- 310
- Published applications
- 325
- Assignees
- 184
- Inventors
- 829
- Latest grant
- 8 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 7 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 4 | 0 |
| 1982 | 3 | 0 |
| 1983 | 11 | 0 |
| 1984 | 10 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 4 | 0 |
| 1993 | 5 | 0 |
| 1994 | 5 | 0 |
| 1995 | 4 | 0 |
| 1996 | 2 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 2 | 0 |
| 2003 | 0 | 1 |
| 2004 | 0 | 5 |
| 2005 | 1 | 1 |
| 2006 | 3 | 1 |
| 2007 | 0 | 1 |
| 2008 | 3 | 2 |
| 2009 | 1 | 3 |
| 2010 | 2 | 3 |
| 2011 | 1 | 4 |
| 2012 | 3 | 7 |
| 2013 | 4 | 5 |
| 2014 | 5 | 16 |
| 2015 | 6 | 12 |
| 2016 | 6 | 12 |
| 2017 | 11 | 31 |
| 2018 | 13 | 32 |
| 2019 | 29 | 43 |
| 2020 | 28 | 30 |
| 2021 | 34 | 32 |
| 2022 | 18 | 23 |
| 2023 | 19 | 23 |
| 2024 | 10 | 6 |
| 2025 | 12 | 16 |
| 2026 | 9 | 16 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 1,3-butylene glycol product8 Sep 2026US 12,728,083 B2Daicel Corporation
- Diol composition and polyester1 Sep 2026US 12,723,130 B2Toray Industries, Inc.
- Process for purification of recovered glycol from chemical recycling of waste polyester7 Jul 2026US 12,673,910 B2Auriga Polymers, Inc.
- Separation process for the production of C5 or C6 alkanediol26 May 2026US 12,637,401 B2Johnson Matthey Davy Technologies Limited
- Process for preparing propylene and polypropylene from CO212 May 2026US 12,624,462 B2Volkswagen Aktiengesellschaft
- Copper silicate-based catalyst and preparation method therefor8 Oct 2026US 2026/0307055 A1LG Chem.Ltd.
- Lithography method8 Oct 2026US 2026/0310079 A1Taiwan Semiconductor Manufacturing Company.Ltd
- 1,6-hexanediol composition and polymer1 Oct 2026US 2026/0297002 A1DIC Corporation
- Polyethylene terephthalate produced from used tires1 Oct 2026US 2026/0297247 A1
- Catalyst for simultaneous conversion reaction of sugar to alcohol and acid and method for simultaneously producing alcohol and acid from sugar by using same16 Jul 2026US 2026/0199878 A1Korea Research Institute of Chemical Technology
Most cited
By later US patents
- Higher aldehyde separation process43US 5,196,596 AUnion Carbide Chemicals & Plastics Technology Corporation · 1993
- Cycloalkyl-hydroxyl compounds and compositions for cholesterol management and related uses34US 7,405,226 B2Pfizer Inc. · 2008
- Process for olefin oxide detoxification30US 4,831,196 AChemrox, Inc. · 1989
- Separation of propylene glycol from 1,2-butanediol by azeotropic29US 5,423,955 A1995
- Hydroxyl compounds and compositions for cholesterol management and related uses29US 7,335,799 B2Esperion Therapeutics, Inc. · 2008