C01B 21/0722
Preparation by direct nitridation of aluminium
Official title: {Preparation by direct nitridation of aluminium}
C01B21/0722 (Preparation by direct nitridation of aluminium) appears on 51 US grants and 45 published applications in this corpus.
Search patents in C01B- Granted patents
- 51
- Published applications
- 45
- Assignees
- 51
- Inventors
- 152
- Latest grant
- 2 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 3 | 3 |
| 2003 | 0 | 5 |
| 2004 | 0 | 1 |
| 2005 | 0 | 1 |
| 2006 | 3 | 1 |
| 2007 | 1 | 4 |
| 2008 | 1 | 4 |
| 2009 | 2 | 2 |
| 2010 | 1 | 1 |
| 2011 | 4 | 1 |
| 2012 | 1 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 2 | 3 |
| 2016 | 0 | 1 |
| 2017 | 1 | 3 |
| 2018 | 2 | 1 |
| 2019 | 1 | 0 |
| 2020 | 0 | 2 |
| 2021 | 0 | 4 |
| 2022 | 2 | 2 |
| 2023 | 0 | 1 |
| 2024 | 1 | 1 |
| 2025 | 4 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing aluminum nitride powder, aluminum nitride powder, and package2 Dec 2025US 12,486,171 B2Tokuyama Corporation
- Aluminum nitride plate16 Sep 2025US 12,415,728 B2NGK Insulators, Ltd.
- AlN crystal preparation method, AlN crystals, and organic compound including AlN crystals22 Jul 2025US 12,365,823 B2National University Corporation Nagoya University
- Method of making aluminum nitride foam3 Jun 2025US 12,319,570 B2CellMo Materials Innovation, Inc.
- Method and apparatus for producing AlN whiskers, AlN whisker bodies, AlN whiskers, resin molded body, and method for producing resin molded body26 Mar 2024US 11,939,267 B2National University Corporation Nagoya University
- Method of Making Aluminum Nitride Foam26 Mar 2026US 2026/0084963 A1
- Method for preparing aluminum nitride powder12 Jun 2025US 2025/0187917 A1National Chung Shan Institute of Science and Technology
- Apparatus for producing aln whiskers13 Jun 2024US 2024/0190776 A1National University Corporation Nagoya University
- Method for Producing Aluminum Nitride Powder, Aluminum Nitride Powder, and Package4 May 2023US 2023/0137083 A1Tokuyama Corporation
- Method for producing metal nitride29 Dec 2022US 2022/0411267 A1Tokuyama Corporation
Most cited
By later US patents
- Microwave plasma chemical synthesis of ultrafine powders120US 6,409,851 B1Materials Modifciation, Inc. · 2002
- Method of fabricating nitride crystal, mixture, liquid phase growth method, nitride crystal, nitride crystal powders, and vapor phase growth method99US 6,270,569 B1Hitachi Cable, Ltd. · 2001
- Method of collecting plasma synthesize ceramic powders89US 5,073,193 AThe University of British Columbia · 1991
- Method of making Group III nitrides77US 7,381,391 B2Cornell Research Foundation, Inc. · 2008
- Process for producing ultrafine particles of ceramics56US 4,642,207 ANational Research Institute for Metals · 1987