C01B 32/225
Expansion
Official title: Expansion; Exfoliation
C01B32/225 (Expansion) appears on 245 US grants and 358 published applications in this corpus.
Search patents in C01B- Granted patents
- 245
- Published applications
- 358
- Assignees
- 210
- Inventors
- 740
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 2 | 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 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 2 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 2 |
| 2002 | 2 | 12 |
| 2003 | 4 | 2 |
| 2004 | 4 | 3 |
| 2005 | 1 | 7 |
| 2006 | 3 | 1 |
| 2007 | 1 | 4 |
| 2008 | 0 | 10 |
| 2009 | 0 | 15 |
| 2010 | 4 | 9 |
| 2011 | 14 | 13 |
| 2012 | 11 | 18 |
| 2013 | 3 | 19 |
| 2014 | 11 | 17 |
| 2015 | 20 | 15 |
| 2016 | 15 | 25 |
| 2017 | 19 | 24 |
| 2018 | 16 | 15 |
| 2019 | 18 | 28 |
| 2020 | 12 | 24 |
| 2021 | 14 | 25 |
| 2022 | 18 | 12 |
| 2023 | 10 | 24 |
| 2024 | 15 | 20 |
| 2025 | 13 | 5 |
| 2026 | 7 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Metamaterial structure and forming method thereof15 Sep 2026US 12,735,322 B2Seoul National University R&Db Foundation
- Method and materials for creating patterns of carbon and/or other elements on substrates or within liquid or frozen media by directed energy deposition of carbon and other elements21 Apr 2026US 12,606,902 B2
- Graphene oxide material and method for the production thereof31 Mar 2026US 12,590,003 B2National University of Ireland, Galway
- Apparatus for treating materials with plasma17 Feb 2026US 12,551,861 B2Directa Plus S.p.A.
- Processes for the preparation of expanded graphite and exfoliated graphene oxide17 Feb 2026US 12,552,672 B2University of Guelph
- Edge-grafting-modified graphene, aqueous dispersion thereof, and preparation methods therefor30 Jul 2026US 2026/0217537 A1China Petroleum & Chemical Corporation
- Heating film, method for preparing same, heating tube, and heating appliance2 Jul 2026US 2026/0190185 A1Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd.
- Methods And Systems For Processing And Recycling Of Carbonaceous Materials21 May 2026US 2026/0138875 A1Nanotech Energy, Inc.
- Graphene/Alkali Metal Composite Anode, Alkali Metal Battery, and Production Method14 May 2026US 2026/0135082 A1Honeycomb Battery Company
- Methods of producing anode active materials and graphene from graphite9 Apr 2026US 2026/0097966 A1NanoXplore Inc.
Most cited
By later US patents
- Nano-scaled graphene plates414US 7,071,258 B1Nanotek Instruments, Inc. · 2006
- Intercalation of graphite153US 4,895,713 AUnion Carbide Corporation · 1990
- Composite reinforcing material and molding material117US 10,421,863 B2Graphene Platform Corporation · 2019
- Composite reinforcing material and method of producing a composite reinforcing material117US 9,862,833 B2Graphene Platform Corporation · 2018
- Composite reinforcing material and molding material117US 9,862,834 B2Graphene Platform Corporation · 2018