C07B 63/02
Purification: by treatment giving rise to a chemical modification
Official title: by treatment giving rise to a chemical modification
C07B63/02 (Purification: by treatment giving rise to a chemical modification) appears on 79 US grants and 79 published applications in this corpus.
Search patents in C07B- Granted patents
- 79
- Published applications
- 79
- Assignees
- 76
- Inventors
- 255
- Latest grant
- 3 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 4 | 0 |
| 1999 | 1 | 0 |
| 2000 | 5 | 0 |
| 2001 | 2 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 2 |
| 2004 | 1 | 1 |
| 2005 | 0 | 0 |
| 2006 | 2 | 1 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 3 |
| 2010 | 0 | 5 |
| 2011 | 1 | 2 |
| 2012 | 2 | 0 |
| 2013 | 1 | 3 |
| 2014 | 2 | 2 |
| 2015 | 1 | 2 |
| 2016 | 2 | 3 |
| 2017 | 0 | 3 |
| 2018 | 7 | 14 |
| 2019 | 10 | 8 |
| 2020 | 7 | 6 |
| 2021 | 5 | 5 |
| 2022 | 3 | 1 |
| 2023 | 4 | 6 |
| 2024 | 1 | 2 |
| 2025 | 2 | 1 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Nano-emulsion compositions containing cannabinoids4 Jun 2026US 2026/0152478 A1Cct Sciences, LLC
- Method for producing purified quaternary ammonium compound aqueous solution16 Apr 2026US 2026/0103437 A1Tokuyama Corporation
- Method for purifying levetiracetam intermediate3 Jul 2025US 2025/0214933 A1Zhejiang Huahai Pharmaceutical Co., Ltd.
- Process for producing high-grade fatty acide polyol esters, particularly fatty acid glycerol esters18 Jul 2024US 2024/0240107 A1IOI OIeo GmbH
Most cited
By later US patents
- Method of, and apparatus for, and irradiation unit for oxidative photopurification62US 5,753,106 A1998
- Depolymerization method for resource recovery from polymeric wastes35US 5,369,215 AS-P Reclamation, Inc. · 1994
- Depolymerization method for resource recovery from polymeric wastes29US 5,264,640 AS-P Reclamation, Inc. · 1993
- Fluorous reaction systems26US 5,777,121 AUniversity of Pittsburgh · 1998
- Process for separating a radionuclide from solution25US 5,409,677 AThe Curators of the University of Missouri · 1995