C07C 31/205
1,3-propanediol
Official title: {1,3-Propanediol; 1,2-Propanediol}
C07C31/205 (1,3-propanediol) appears on 44 US grants and 54 published applications in this corpus.
Search patents in C07C- Granted patents
- 44
- Published applications
- 54
- Assignees
- 36
- Inventors
- 141
- Latest grant
- 12 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 1 | 5 |
| 2015 | 1 | 4 |
| 2016 | 2 | 2 |
| 2017 | 3 | 2 |
| 2018 | 1 | 13 |
| 2019 | 9 | 13 |
| 2020 | 12 | 4 |
| 2021 | 6 | 4 |
| 2022 | 0 | 0 |
| 2023 | 2 | 3 |
| 2024 | 1 | 0 |
| 2025 | 2 | 2 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Process for preparing propylene and polypropylene from CO212 May 2026US 12,624,462 B2Volkswagen Aktiengesellschaft
- Method for increasing propylene oxide output of an integrated process for making propylene oxide and propylene glycol17 Mar 2026US 12,577,218 B2Evonik Operations GmbH
- Method for the preparation of 1,2-propanediol2 Dec 2025US 12,486,209 B2Evonik Operations GmbH
- Sorbent compositions for the removal of boron from aqueous mediums8 Apr 2025US 12,269,755 B2ADA Carbon Solutions, LLC
- Methods for vicinal diol separation8 Oct 2024US 12,110,267 B2Board of Trustees of Michigan State University
- Process for preparing propylene and polypropylene from co229 Jan 2026US 2026/0028725 A1Volkswagen Aktiengesellschaft
- Process for Producing 1,2-Alkanediol From the Corresponding Alkene and Hydrogen Peroxide29 May 2025US 2025/0171389 A1Dow Global Technologies LLC
- Methods for vicinal diol separation1 May 2025US 2025/0136536 A1Board of Trustees of Michigan State University
- A method for the preparation of 1,2-propanediol21 Dec 2023US 2023/0406794 A1Evonik Operations GmbH
- A method for increasing propylene oxide output of an integrated process for making propylene oxide and propylene glycol30 Nov 2023US 2023/0382878 A1Evonik Operations GmbH
Most cited
By later US patents
- Crystalline forms of N-(2-chloro-6-methy]phenvn-2-[F6-[4-(2-hvdroxvethvl)-L-piperazin-vil-2-methvil-4-pvrimidinvllaminol-5-thiazolecarboxamide and their process thereof14US 10,301,302 B2Msn Laboratories Private Limited · 2019
- Methods and compositions incorporating alkyl polyglycoside surfactant for use in oil and/or gas wells11US 10,421,707 B2Flotek Chemistry, LLC · 2019
- Alcohol production11US 4,144,401 AChevron Research Company · 1979
- Process for the separation of glycols7US 10,081,584 B2Shell Oil Company · 2018
- Process for the preparation of glycols5US 10,294,181 B2Shell Oil Company · 2019