B01J 27/24
Nitrogen compounds
B01J27/24 (Nitrogen compounds) appears on 846 US grants and 852 published applications in this corpus.
Search patents in B01J- Granted patents
- 846
- Published applications
- 852
- Assignees
- 500
- Inventors
- 2,486
- Latest grant
- 1 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 6 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 4 | 0 |
| 1980 | 7 | 0 |
| 1981 | 4 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 8 | 0 |
| 1985 | 4 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 3 | 0 |
| 1989 | 7 | 0 |
| 1990 | 11 | 0 |
| 1991 | 7 | 0 |
| 1992 | 9 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 11 | 0 |
| 1997 | 10 | 0 |
| 1998 | 15 | 0 |
| 1999 | 8 | 0 |
| 2000 | 12 | 0 |
| 2001 | 13 | 3 |
| 2002 | 13 | 13 |
| 2003 | 19 | 30 |
| 2004 | 26 | 20 |
| 2005 | 20 | 20 |
| 2006 | 18 | 27 |
| 2007 | 10 | 16 |
| 2008 | 5 | 15 |
| 2009 | 5 | 12 |
| 2010 | 12 | 17 |
| 2011 | 5 | 22 |
| 2012 | 7 | 30 |
| 2013 | 19 | 44 |
| 2014 | 22 | 33 |
| 2015 | 35 | 39 |
| 2016 | 26 | 47 |
| 2017 | 40 | 45 |
| 2018 | 40 | 52 |
| 2019 | 59 | 47 |
| 2020 | 47 | 58 |
| 2021 | 38 | 59 |
| 2022 | 43 | 40 |
| 2023 | 36 | 45 |
| 2024 | 34 | 49 |
| 2025 | 58 | 40 |
| 2026 | 28 | 29 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Preparation method for Ag and g-C3N4 co-modified ZnO nanocomposite material using polymer network gel method1 Sep 2026US 12,723,144 B2Southwest Minzu University
- Composite for air purification, method of manufacturing the same, and filter including the same25 Aug 2026US 12,714,958 B2Hyundai Motor Company
- Synthesis of atomically dispersed M—N—C catalysts via selective metalation11 Aug 2026US 12,702,970 B2Wisconsin Alumni Research Foundation
- Fe—N—C catalysts synthesized by non-contact pyrolysis of gas phase iron11 Aug 2026US 12,706,314 B2Northeastern University
- Solar production of hydrogen using defect engineered boron-rich photocalysts30 Jun 2026US 12,668,487 B2University of Central Florida Research Foundation, Inc.
- Intermetallic catalyst complex for electrochemical device and method of manufacturing same8 Oct 2026US 2026/0307054 A1Hyundai Motor Company
- Robotic liquid crystal elastomers, apparatus, and method of manufacture10 Sep 2026US 2026/0265607 A1Massachusetts Institute of Technology
- Catalyst for decomposing perfluorocompounds27 Aug 2026US 2026/0249272 A1Ecoprohn
- Heterogeneous catalyst with dual catalytic centers, and preparation method and use thereof27 Aug 2026US 2026/0249279 A1China Petroleum & Chemical Corporation
- Double metal cyanide catalyst and method for preparing same20 Aug 2026US 2026/0241373 A1Gs Caltex Corporation
Most cited
By later US patents
- Process for preparing metal cyanide complex catalyst287US 5,158,922 AARCO Chemical Technology, L. P. · 1992
- Double metal cyanide complex catalysts279US 5,470,813 AARCO Chemical Technology, L. P. · 1995
- Highly active double metal cyanide catalysts250US 5,482,908 AARCO Chemical Technology, L. P. · 1996
- Catalysts for the polymerization of epoxides and process for the preparation of such catalysts144US 4,477,589 AShell Oil Company · 1984
- Nanocoated primary particles and method for their manufacture141US 6,913,827 B2The Regents of the University of Colorado · 2005