C07C 209/82
Purification
Official title: Purification; Separation; Stabilisation; Use of additives
C07C209/82 (Purification) appears on 487 US grants and 441 published applications in this corpus.
Search patents in C07C- Granted patents
- 487
- Published applications
- 441
- Assignees
- 293
- Inventors
- 1,450
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 4 | 0 |
| 1985 | 6 | 0 |
| 1986 | 6 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 6 | 0 |
| 1991 | 8 | 0 |
| 1992 | 9 | 0 |
| 1993 | 6 | 0 |
| 1994 | 12 | 0 |
| 1995 | 10 | 0 |
| 1996 | 3 | 0 |
| 1997 | 13 | 0 |
| 1998 | 14 | 0 |
| 1999 | 22 | 0 |
| 2000 | 8 | 0 |
| 2001 | 13 | 1 |
| 2002 | 13 | 10 |
| 2003 | 9 | 12 |
| 2004 | 7 | 10 |
| 2005 | 5 | 19 |
| 2006 | 12 | 12 |
| 2007 | 13 | 26 |
| 2008 | 7 | 13 |
| 2009 | 11 | 19 |
| 2010 | 8 | 17 |
| 2011 | 10 | 16 |
| 2012 | 10 | 14 |
| 2013 | 13 | 17 |
| 2014 | 18 | 14 |
| 2015 | 19 | 24 |
| 2016 | 16 | 23 |
| 2017 | 13 | 19 |
| 2018 | 15 | 26 |
| 2019 | 25 | 16 |
| 2020 | 19 | 25 |
| 2021 | 19 | 14 |
| 2022 | 10 | 15 |
| 2023 | 8 | 19 |
| 2024 | 10 | 24 |
| 2025 | 18 | 16 |
| 2026 | 7 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Organic molecules for use in light-emitting devices29 Sep 2026US 12,747,210 B2Samsung Display Co., Ltd.
- Alkylamine composition and method for storing said alkylamine composition21 Jul 2026US 12,686,656 B2Central Glass Company, Limited
- Crystalline form of triethylenetetramine tetrahydrochloride and its pharmaceutical use23 Jun 2026US 12,662,445 B2Orphalan S.A.
- Method for recovering raw and auxiliary materials in the production of lithium bis(fluorosulfonyl)imide9 Jun 2026US 12,649,659 B2Catl-Sicong Novel Materials Co., Ltd
- Method for reactivating a precious metal iron catalyst and performing a chemical reaction14 Apr 2026US 12,600,695 B2Dow Global Technologies LLC
- Method for producing methylamines in the gas phase with improved control of the reactor inlet temperature8 Oct 2026US 2026/0308104 A1BASF SE
- A process for the preparation of crystalline form a of n, n'-bis(2-aminoethyl)-1,2-ethanediamine tetrahydrochloride8 Oct 2026US 2026/0308105 A1Biophore India Pharmaceuticals PVT. Ltd.
- Method for manufacture of ethyleneamines3 Sep 2026US 2026/0257985 A1BASF SE
- Onium cation with ether linkages for zinc batteries20 Aug 2026US 2026/0245979 A1U.S. Government as represented by the Secretary of the Army
- Method for producing diamine and dicarboxylic acid, method for recycling polyamide, and polyamide6 Aug 2026US 2026/0225993 A1Asahi Kasei Kabushiki Kaisha
Most cited
By later US patents
- Compositions containing and methods of using 1-aminoindan and derivatives thereof and process for preparing optically active 1-aminoindan derivatives68US 5,877,218 ATeva Pharmaceutical Industries Ltd. · 1999
- Method for dehydration and concentration of aqueous solution containing organic compound64US 4,978,430 AUbe Industries, Ltd. · 1990
- Method for producing high purity hydroxides and alkoxides33US 5,389,211 ASachem, Inc. · 1995
- Process for preparing antihistamine tannates33US 5,663,415 AJame Fine Chemicals, Inc. · 1997
- Enantiomeric resolution32US 5,442,117 AAlbemarle Corporation · 1995