C01B 32/21
After-treatment
C01B32/21 (After-treatment) appears on 935 US grants and 1,394 published applications in this corpus.
Search patents in C01B- Granted patents
- 935
- Published applications
- 1,394
- Assignees
- 711
- Inventors
- 3,053
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 2 | 0 |
| 1978 | 6 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 4 | 0 |
| 1984 | 1 | 0 |
| 1985 | 5 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 4 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 4 | 0 |
| 1995 | 2 | 0 |
| 1996 | 7 | 0 |
| 1997 | 5 | 0 |
| 1998 | 2 | 0 |
| 1999 | 4 | 0 |
| 2000 | 5 | 0 |
| 2001 | 4 | 5 |
| 2002 | 4 | 16 |
| 2003 | 7 | 7 |
| 2004 | 7 | 12 |
| 2005 | 2 | 16 |
| 2006 | 4 | 13 |
| 2007 | 3 | 12 |
| 2008 | 2 | 15 |
| 2009 | 5 | 29 |
| 2010 | 12 | 25 |
| 2011 | 19 | 35 |
| 2012 | 17 | 49 |
| 2013 | 16 | 63 |
| 2014 | 33 | 69 |
| 2015 | 47 | 72 |
| 2016 | 69 | 92 |
| 2017 | 82 | 93 |
| 2018 | 60 | 76 |
| 2019 | 63 | 72 |
| 2020 | 58 | 78 |
| 2021 | 50 | 85 |
| 2022 | 58 | 77 |
| 2023 | 43 | 103 |
| 2024 | 70 | 99 |
| 2025 | 76 | 101 |
| 2026 | 39 | 80 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Artificial graphite and preparation method thereof, secondary battery containing such artificial graphite, and electric apparatus6 Oct 2026US 12,755,973 B2Contemporary Amperex Technology Co., Limited
- Graphene oxide, positive electrode for nonaqueous secondary battery using graphene oxide, method of manufacturing positive electrode for nonaqueous secondary battery, nonaqueous secondary battery, and electronic device6 Oct 2026US 12,755,980 B2Semiconductor Energy Laboratory Co.Ltd.
- Graphene oxide, positive electrode for nonaqueous secondary battery using graphene oxide, method of manufacturing positive electrode for nonaqueous secondary battery, nonaqueous secondary battery, and electronic device29 Sep 2026US 12,749,686 B2Semiconductor Energy Laboratory Co.Ltd.
- Metamaterial structure and forming method thereof15 Sep 2026US 12,735,322 B2Seoul National University R&Db Foundation
- Process for purifying and producing a high purity particulate graphite material for use in lithium-ion batteries1 Sep 2026US 12,722,978 B1Green Graphite Technologies, Inc.
- Negative electrode active material, negative electrode sheet, secondary battery, and electronic device1 Oct 2026US 2026/0302234 A1Ningde Amperex Technology Limited
- Graphene and methods of making graphene17 Sep 2026US 2026/0274675 A1
- Graphite agglomerate particles, method of production thereof, and their use in electrochemical cells17 Sep 2026US 2026/0274676 A1Nouveau Monde Graphite Inc.
- Anisotropic graphite composite and manufacturing method therefor17 Sep 2026US 2026/0274677 A1Kaneka Corporation
- Composite graphite material, method for preparing same, negative electrode sheet, secondary battery, battery module, battery pack, and electrical apparatus17 Sep 2026US 2026/0274678 A1Contemporary Amperex Technology (Hong Kong) Limited
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