C01F 7/448
Using superatmospheric pressure
Official title: using superatmospheric pressure, e.g. hydrothermal conversion of gibbsite into boehmite
C01F7/448 (Using superatmospheric pressure) appears on 69 US grants and 53 published applications in this corpus.
Search patents in C01F- Granted patents
- 69
- Published applications
- 53
- Assignees
- 63
- Inventors
- 193
- Latest grant
- 14 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 2 | 0 |
| 1992 | 0 | 0 |
| 1993 | 3 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 1 | 1 |
| 2002 | 5 | 0 |
| 2003 | 3 | 5 |
| 2004 | 2 | 4 |
| 2005 | 1 | 5 |
| 2006 | 4 | 7 |
| 2007 | 2 | 6 |
| 2008 | 2 | 3 |
| 2009 | 2 | 4 |
| 2010 | 2 | 4 |
| 2011 | 1 | 0 |
| 2012 | 6 | 1 |
| 2013 | 4 | 1 |
| 2014 | 0 | 1 |
| 2015 | 2 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 1 |
| 2018 | 0 | 1 |
| 2019 | 1 | 1 |
| 2020 | 0 | 1 |
| 2021 | 0 | 0 |
| 2022 | 1 | 1 |
| 2023 | 1 | 2 |
| 2024 | 0 | 1 |
| 2025 | 1 | 1 |
| 2026 | 3 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method of producing boehmite nanoparticles and apparatus for producing the same14 Jul 2026US 12,679,739 B2SK Innovation Co., Ltd.
- Crystalline boehmite materials as precursors for large crystal gamma alumina and low surface area alpha alumina5 May 2026US 12,617,690 B2BASF SE
- Method for preparing high purity aluminum monohydrate and alpha alumina20 Jan 2026US 12,528,710 B2Almatis GmbH
- Boehmite structure and method for producing same24 Jun 2025US 12,338,131 B2Panasonic Intellectual Property Management Co., Ltd.
- Alumina hydrate particles, flame retardant, resin composition and electric wire/cable28 Feb 2023US 11,591,520 B2Konoshima Chemical Co., Ltd.
- Method for producing hydrophilized product3 Sep 2026US 2026/0262482 A1Resonac Corporation
- Method for preparing high purity aluminum monohydrate and alpha alumina24 Apr 2025US 2025/0128956 A1Almatis GmbH
- Boehmite structure and method for producing same19 Dec 2024US 2024/0417330 A1Panasonic Intellectual Property Management Co., Ltd.
- Crystalline boehmite materials as precursors for large crystal gamma alumina and low surface area alpha alumina16 Nov 2023US 2023/0365424 A1BASF SE
- Method of Producing Boehmite Nanoparticles and Apparatus for Producing the Same11 May 2023US 2023/0144299 A1SK Innovation Co., Ltd.
Most cited
By later US patents
- Boehmite produced by a seeded hydyothermal process and ceramic bodies produced therefrom140US 4,797,139 ANorton Company · 1989
- Process for manufacturing alpha alumina from dispersible boehmite125US 5,178,849 ANorton Company · 1993
- Alumina trihydrate derived high pore volume, high surface area aluminum oxide composites and methods of their preparation and use49US 6,403,526 B1W. R. Grace & Co.-Conn. · 2002
- Alumina powder, process for producing the same and polishing composition41US 6,440,187 B1Nissan Chemical Industries, Ltd. · 2002
- Process for producing an acidic aqueous alumina sol38US 5,989,515 ANissan Chemical Industries, Ltd. · 1999