C01B 21/0648
After-treatment
Official title: {After-treatment, e.g. grinding, purification (transformation of hexagonal into cubic or wurtzitic boron nitride C04B35/5831)}
C01B21/0648 (After-treatment) appears on 169 US grants and 257 published applications in this corpus.
Search patents in C01B- Granted patents
- 169
- Published applications
- 257
- Assignees
- 133
- Inventors
- 531
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 2 | 0 |
| 2001 | 2 | 0 |
| 2002 | 0 | 2 |
| 2003 | 2 | 1 |
| 2004 | 2 | 2 |
| 2005 | 2 | 1 |
| 2006 | 0 | 2 |
| 2007 | 1 | 0 |
| 2008 | 0 | 1 |
| 2009 | 1 | 2 |
| 2010 | 0 | 6 |
| 2011 | 2 | 5 |
| 2012 | 1 | 5 |
| 2013 | 1 | 1 |
| 2014 | 4 | 8 |
| 2015 | 7 | 12 |
| 2016 | 8 | 17 |
| 2017 | 10 | 18 |
| 2018 | 9 | 13 |
| 2019 | 20 | 21 |
| 2020 | 19 | 26 |
| 2021 | 11 | 27 |
| 2022 | 14 | 21 |
| 2023 | 14 | 17 |
| 2024 | 11 | 22 |
| 2025 | 13 | 17 |
| 2026 | 8 | 10 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Boron nitride powder, method of manufacturing boron nitride powder, resin material, and method of manufacturing resin material6 Oct 2026US 12,753,076 B2Jfe Steel Corporation
- Methods and compositions for highly purified boron nitride nanotubes15 Sep 2026US 12,735,319 B2College of William and Mary
- Metamaterial structure and forming method thereof15 Sep 2026US 12,735,322 B2Seoul National University R&Db Foundation
- Production of boron nitride nanosheets9 Jun 2026US 12,649,657 B2Deakin University
- Hexagonal boron nitride powder and method for producing the same26 May 2026US 12,637,356 B2Tokuyama Corporation
- Production method for boron nitride particles, production method for resin composition, and uses therefor8 Oct 2026US 2026/0307992 A1Resonac Corporation
- Method for preparing boron nitride nanosheets, method for preparing boron nitride nanosheet-based fibers, and fibers prepared thereby24 Sep 2026US 2026/0285683 A1Iucf-Hyu (Industry-University Cooperation Foundation Hanyang University)
- Hexagonal boron nitride powder and production method therefor17 Sep 2026US 2026/0274669 A1Tokuyama Corporation
- Pellicle film, pellicle, exposure original plate with pellicle, exposure method, semiconductor manufacturing method, and liquid crystal display panel manufacturing method13 Aug 2026US 2026/0235945 A1Shin-Etsu Chemical Co., Ltd.
- Method for producing organically modified inorganic fine particle and organically modified inorganic fine particle2 Jul 2026US 2026/0184928 A1Super Nano Design Co., Ltd.
Most cited
By later US patents
- BX CY NZ nanotubes and nanoparticles79US 6,231,980 B1The Regents of the University of California · 2001
- Method for making nanotubes and nanoparticles74US 6,063,243 AThe Regents of the Univeristy of California · 2000
- Hexagonal boron nitride powder having excellent sinterability and a method for the preparation thereof43US 4,784,978 AKawasaki Refractories Co., Ltd. · 1988
- High solids hBN slurry, hBN paste, spherical hBN powder, and methods of making and using them38US 6,645,612 B2Saint-Gobain Ceramics & Plastics, Inc. · 2003
- Highly delaminated hexagonal boron nitride powders, process for making, and uses thereof33US 6,951,583 B2Saint-Gobain Ceramics & Plastics, Inc. · 2005