C22B 3/362
Heterocyclic compounds of a single type
Official title: {Heterocyclic compounds of a single type}
C22B3/362 (Heterocyclic compounds of a single type) appears on 112 US grants and 25 published applications in this corpus.
Search patents in C22B- Granted patents
- 112
- Published applications
- 25
- Assignees
- 69
- Inventors
- 212
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 12 | 0 |
| 1978 | 10 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 4 | 0 |
| 1986 | 6 | 0 |
| 1987 | 6 | 0 |
| 1988 | 5 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 4 | 0 |
| 1992 | 0 | 0 |
| 1993 | 7 | 0 |
| 1994 | 8 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 1 |
| 2008 | 1 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 1 | 6 |
| 2013 | 5 | 3 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 1 | 0 |
| 2017 | 0 | 0 |
| 2018 | 0 | 0 |
| 2019 | 0 | 0 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 2 |
| 2023 | 1 | 3 |
| 2024 | 0 | 1 |
| 2025 | 1 | 2 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for separation of adjacent lanthanide elements23 Jun 2026US 12,662,714 B2UT-Battelle, LLC
- Pad surface regeneration and metal recovery11 Nov 2025US 12,466,025 B2Chempower Corporation
- Method for whole component microwave fast digestion and precious metal extraction from ionic liquid of waste circuit board30 May 2023US 11,661,639 B2Beijing University of Technology
- Extracting rare earth metal from acidic solution by contacting with ionic liquid composition26 Jul 2022US 11,396,684 B2The Queen's University of Belfast
- Pretreatment method for chelate resin having pyridine ring used for collecting catalyst in terephthalic acid production process24 May 2016US 9,347,112 B2Mitsubishi Gas Chemical Company, Inc.
- Methods for carbon capture and metal recovery and related systems24 Sep 2026US 2026/0284595 A1Battelle Energy Alliance, LLC
- Battery recycling materials3 Sep 2026US 2026/0258523 A1Uchicago Argonne, LLC
- Use of lipophilic derivatives of aminopolycarboxylic acids for the extraction of rare earths from an acidic aqueous solution14 May 2026US 2026/0132482 A1Centre National De La Recherche Scientifique
- An integrated method and system for trivalent actinides and lanthanides separation and trivalent actinides mutual separation12 Jun 2025US 2025/0188569 A1China Institute of Atomic Energy
- Method for the selective recovery of gold, platinum, and palladium using dual organic solvent extraction.3 Apr 2025US 2025/0109455 A1
Most cited
By later US patents
- Method for separating metal constituents from ocean floor nodules46US 4,042,664 ADeepsea Ventures, Inc. · 1977
- Microencapsulated chelating agents and their use in removing metal ions from aqueous solutions43US 4,500,494 AStauffer Chemical Company · 1985
- Method of recovering metal from metalliferous waste37US 3,966,569 AMX Processor Reinhardt & Co. AB · 1976
- Macrocyclic oxamides36US 5,298,618 ATexaco Chemical Company · 1994
- Process for liquid/liquid extraction of gallium31US 3,971,843 ARhone-Poulenc Industries · 1976