C04B 41/5031
Alumina
Official title: {Alumina}
C04B41/5031 (Alumina) appears on 175 US grants and 192 published applications in this corpus.
Search patents in C04B- Granted patents
- 175
- Published applications
- 192
- Assignees
- 153
- Inventors
- 575
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 1 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 4 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 7 | 0 |
| 1993 | 2 | 0 |
| 1994 | 3 | 0 |
| 1995 | 1 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 3 | 0 |
| 1999 | 4 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 7 | 6 |
| 2003 | 3 | 4 |
| 2004 | 2 | 7 |
| 2005 | 4 | 3 |
| 2006 | 3 | 10 |
| 2007 | 8 | 8 |
| 2008 | 2 | 9 |
| 2009 | 4 | 9 |
| 2010 | 3 | 3 |
| 2011 | 3 | 3 |
| 2012 | 5 | 5 |
| 2013 | 4 | 1 |
| 2014 | 1 | 8 |
| 2015 | 4 | 7 |
| 2016 | 5 | 4 |
| 2017 | 6 | 7 |
| 2018 | 0 | 3 |
| 2019 | 8 | 15 |
| 2020 | 4 | 9 |
| 2021 | 8 | 20 |
| 2022 | 9 | 8 |
| 2023 | 7 | 8 |
| 2024 | 9 | 11 |
| 2025 | 8 | 19 |
| 2026 | 7 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Composite ceramic substrate having multi-layer configuration29 Sep 2026US 12,747,191 B2Tong Hsing Electronic Industries, Ltd.
- Permeating treatment method for radially oriented sintered magnet, magnet, and composition for magnet permeation29 Sep 2026US 12,749,620 B2China Rare Earth Radimag (Shenzhen) Technology Co., Ltd.
- Heat-resistant member19 May 2026US 12,630,476 B2KYOCERA Corporation
- Methods to remove an EBC from a substrate and to repair a coated component5 May 2026US 12,617,735 B2General Electric Company
- Methods to remove an EBC from a substrate and to repair a coated component21 Apr 2026US 12,606,498 B2General Electric Company
- Environmental barrier coatings and methods of formation17 Sep 2026US 2026/0274763 A1General Electric Company
- Structural member26 Mar 2026US 2026/0085017 A1Toto Ltd.
- Conductive ceramic composites for high temperature thermal energy storage15 Jan 2026US 2026/0015293 A1The Regents of the University of California
- Coating system with alkaline earth oxides8 Jan 2026US 2026/0009141 A1General Electric Company
- Enclosure1 Jan 2026US 2026/0005359 A1Darchem Engineering Ltd.
Most cited
By later US patents
- Alumina composite body and method for its manufacture79US 4,673,435 AToshiba Ceramics Co., Ltd. · 1987
- Process for producing fiber reinforced composite74US 5,876,659 AHitachi, Ltd. · 1999
- Nanoscale corundum powders, sintered compacts produced from these powders and method for producing the same68US 7,022,305 B2Leibniz-Institut fuer Neue Materialien gemeinnuetzige GmbH · 2006
- Method of making a coated cemented carbide body and resulting body67US 4,619,866 ASantrade Ltd. · 1986
- Method of generating integrated circuit feature layout for improved chemical mechanical polishing56US 6,486,066 B2Matrix Semiconductor, Inc. · 2002