C01B 21/0685
Preparation by carboreductive nitridation
Official title: {Preparation by carboreductive nitridation}
C01B21/0685 (Preparation by carboreductive nitridation) appears on 60 US grants and 16 published applications in this corpus.
Search patents in C01B- Granted patents
- 60
- Published applications
- 16
- Assignees
- 37
- Inventors
- 124
- Latest grant
- 23 Dec 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 4 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 1 | 0 |
| 1991 | 7 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 3 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 3 | 2 |
| 2010 | 0 | 2 |
| 2011 | 1 | 1 |
| 2012 | 0 | 1 |
| 2013 | 1 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 1 |
| 2017 | 0 | 2 |
| 2018 | 0 | 1 |
| 2019 | 3 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Recent patents
- Methods of adjusting carbon and silica content in rice hull ash (RHA) byproducts to control carbothermal reduction forming nanostructured silicon carbide, silicon nitride, silicon oxynitride nanocomposites23 Dec 2025US 12,506,144 B2The Regents of the University of Michigan
- Nanostructured silicon nitride synthesis from agriculture waste26 May 2020US 10,662,062 B2The Government of the United States of America, as represented by the Secretary of the Navy
- Ceramic wafer and the manufacturing method thereof3 Dec 2019US 10,497,638 B2Hong Chuang Applied Technology Co., Ltd.
- Carbothermal reduction reactor system, components thereof, and methods of using same3 Sep 2019US 10,400,309 B2The Regents of the University of Colorado, a body corporate
- Nanostructured silicon nitride synthesis from agriculture waste26 Mar 2019US 10,239,757 B2The United States of America as represented by the Secretary of the Navy
- Methods of adjusting carbon and silica content in rice hull ash (rha) byproducts to control carbothermal reduction forming nanostructured silicon carbide, silicon nitride, silicon oxynitride nanocomposites24 Apr 2025US 2025/0132323 A1The Regents of the University of Michigan
- Nanostructured Silicon Nitride Synthesis from Agriculture Waste6 Jun 2019US 2019/0169028 A1The Government of the United States of America, as represented by the Secretary of the Navy
- Ceramic wafer and the manufacturing method thereof22 Feb 2018US 2018/0053706 A1Hong Chuang Applied Technology Co., Ltd.
- Nanostructured Silicon Nitride Synthesis from Agriculture Waste21 Dec 2017US 2017/0362087 A1The Government of the United States of America, as represented by the Secretary of the Navy
- Polycrystalline Silicon Powder for Slurry and Method for Producing Same, Polycrystalline Silicon Powder Slurry for Mold Release Material and Method for Producing Same, Polycrystalline Silicon Powder for Mold Release Material, Mold Release Material, and Polycrystalline Silicon Ingot Casting Mold and Method for Producing Same22 Jun 2017US 2017/0174515 A1Ube Industries, Ltd.
Most cited
By later US patents
- Apparatus for treating powdery materials utilizing microwave plasma49US 4,423,303 ATokyo Shibaura Denki Kabushiki Kaisha · 1983
- Method of making metal carbide and nitride powders40US 4,784,839 AAtochem · 1988
- Silicon nitride/silicon carbide composite powders29US 5,525,556 AThe Dow Chemical Company · 1996
- Apparatus for manufacturing powdered silicon nitride25US 4,640,023 ADirector-General of Agency of Industrial Science and Technology · 1987
- Process for preparing silicon nitride powder22US 4,514,370 ATokyo Shibaura Denki Kabushiki Kaisha · 1985