B01J 20/3255
Comprising a cyclic structure containing at least one of the heteroatoms nitrogen
Official title: {comprising a cyclic structure containing at least one of the heteroatoms nitrogen, oxygen or sulfur, e.g. heterocyclic or heteroaromatic structures}
B01J20/3255 (Comprising a cyclic structure containing at least one of the heteroatoms nitrogen) appears on 306 US grants and 269 published applications in this corpus.
Search patents in B01J- Granted patents
- 306
- Published applications
- 269
- Assignees
- 241
- Inventors
- 885
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 4 | 0 |
| 1983 | 4 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 3 | 0 |
| 1988 | 8 | 0 |
| 1989 | 5 | 0 |
| 1990 | 2 | 0 |
| 1991 | 8 | 0 |
| 1992 | 7 | 0 |
| 1993 | 5 | 0 |
| 1994 | 9 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 6 | 0 |
| 1998 | 6 | 0 |
| 1999 | 12 | 0 |
| 2000 | 11 | 0 |
| 2001 | 8 | 5 |
| 2002 | 13 | 12 |
| 2003 | 7 | 8 |
| 2004 | 5 | 14 |
| 2005 | 7 | 13 |
| 2006 | 8 | 13 |
| 2007 | 6 | 9 |
| 2008 | 8 | 17 |
| 2009 | 7 | 13 |
| 2010 | 6 | 12 |
| 2011 | 8 | 11 |
| 2012 | 6 | 12 |
| 2013 | 17 | 8 |
| 2014 | 10 | 14 |
| 2015 | 9 | 16 |
| 2016 | 15 | 10 |
| 2017 | 6 | 8 |
| 2018 | 6 | 4 |
| 2019 | 4 | 4 |
| 2020 | 6 | 6 |
| 2021 | 5 | 12 |
| 2022 | 5 | 8 |
| 2023 | 6 | 8 |
| 2024 | 3 | 15 |
| 2025 | 5 | 13 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Materials including alkyl diamine-substituted aryl compounds, methods of making, and methods of separating CO215 Sep 2026US 12,734,481 B2Georgia Tech Research Corporation
- Material and method for performing a separation based on halogen bonding19 May 2026US 12,629,612 B2Merck Patent GmbH
- Anionic exchange-hydrophobic mixed mode chromatography resins22 Jul 2025US 12,364,978 B2Bio-Rad Laboratories, Inc.
- Redox active materials, processes and uses thereof8 Jul 2025US 12,351,589 B2Kasis Environmental Ltd.
- Anionic exchange-hydrophobic mixed mode chromatography resin1 Jul 2025US 12,343,702 B2Bio-Rad Laboratories, Inc.
- Processes for reducing environmental availability of environmental pollutants6 Aug 2026US 2026/0225068 A1Albemarle Corporation
- Water-insoluble carrier for activated platelet removal11 Jun 2026US 2026/0158204 A1Toray Industries, Inc.
- Mixed mode charge induction ion exchange (iex) chromatography (mmciic) ligands and methods of use28 May 2026US 2026/0145159 A1Bio-Rad Laboratories, Inc.
- Material and method for performing a separation based on halogen bonding5 Mar 2026US 2026/0061338 A1Merck Patent GmbH
- Functionalized Fullerenes for Efficient Lithium Extraction.4 Dec 2025US 2025/0367635 A1
Most cited
By later US patents
- Preparation of trichloro-s-triazine activated supports for coupling ligands276US 4,229,537 ANew York University · 1980
- Regenerable solid amine sorbent150US 5,876,488 AUnited Technologies Corporation · 1999
- Filter medium having a limited surface negative charge for treating a blood material109US 5,407,581 AAsahi Medical Co., Ltd. · 1995
- Regenerable supported amine-polyol sorbent97US 5,376,614 AUnited Technologies Corporation · 1994
- Surface functionalized mesoporous material and method of making same91US 6,326,326 B1Battelle Memorial Institute · 2001