C04B 2235/3878
Alpha silicon nitrides
C04B2235/3878 (Alpha silicon nitrides) appears on 133 US grants and 138 published applications in this corpus.
Search patents in C04B- Granted patents
- 133
- Published applications
- 138
- Assignees
- 87
- Inventors
- 262
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 1 | 2 |
| 2002 | 2 | 3 |
| 2003 | 3 | 4 |
| 2004 | 3 | 6 |
| 2005 | 2 | 3 |
| 2006 | 5 | 8 |
| 2007 | 4 | 11 |
| 2008 | 5 | 9 |
| 2009 | 8 | 13 |
| 2010 | 7 | 9 |
| 2011 | 7 | 5 |
| 2012 | 7 | 11 |
| 2013 | 14 | 4 |
| 2014 | 5 | 3 |
| 2015 | 2 | 2 |
| 2016 | 3 | 1 |
| 2017 | 6 | 5 |
| 2018 | 3 | 5 |
| 2019 | 4 | 6 |
| 2020 | 3 | 2 |
| 2021 | 3 | 4 |
| 2022 | 0 | 4 |
| 2023 | 4 | 5 |
| 2024 | 3 | 4 |
| 2025 | 2 | 6 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrostatic chuck, electrostatic chuck heater comprising same, and semiconductor holding device10 Feb 2026US 12,545,630 B2Amosense Co., Ltd.
- Silicon nitride sintered body, wear-resistant member using the same, and method for producing silicon nitride sintered body13 May 2025US 12,297,152 B2Kabushiki Kaisha Toshiba
- Phosphor plate, light emitting device, and method for manufacturing phosphor plate22 Apr 2025US 12,284,848 B2Denka Company Limited
- Method for improving the wear performance of ceramic-polyethylene or ceramic-ceramic articulation couples utilized in orthopedic joint prostheses27 Aug 2024US 12,070,391 B2SINTX Technologies, Inc.
- Method for manufacturing active metal-brazed nitride ceramic substrate with excellent joining strength23 Apr 2024US 11,964,919 B2Zone Infinityco., Ltd.
- Silicon nitride sintered body and wear-resistant member using same4 Jun 2026US 2026/0152442 A1Niterra Materials Co., Ltd.
- Silicon nitride substrate and silicon nitride substrate production method19 Mar 2026US 2026/0078064 A1Niterra Materials Co., Ltd.
- Silicon nitride-type sintered body, bearing rolling element, silicon nitride-type blank ball, and bearing12 Feb 2026US 2026/0042709 A1AGC Inc.
- Ceramic horology or jewellery component25 Dec 2025US 2025/0390064 A1Comadur SA
- Silicon nitride sintered body, wear-resistant member, bearing ball, and bearing18 Dec 2025US 2025/0382234 A1Niterra Materials Co., Ltd.
Most cited
By later US patents
- Oxynitride phosphor activated by a rare earth element, and sialon type phosphor47US 6,632,379 B2National Institute for Materials Science · 2003
- Sintered body of ceramics and preparation thereof32US 4,407,970 ATokyo Shibaura Denki Kabushiki Kaisha · 1983
- Inorganic fiber-reinforced ceramic composite material28US 4,618,529 AUbe Industries, Ltd. · 1986
- Method of forming ceramic products26US 3,991,148 AJoseph Lucas (Industries) Limited · 1976
- High thermal conductive silicon nitride sintered body and method of producing the same24US 5,439,856 AKabushiki Kaisha Toshiba · 1995