D01F 9/12
Carbon filaments
Official title: Carbon filaments; Apparatus specially adapted for the manufacture thereof
D01F9/12 (Carbon filaments) appears on 2,051 US grants and 2,086 published applications in this corpus.
Search patents in D01F- Granted patents
- 2,051
- Published applications
- 2,086
- Assignees
- 926
- Inventors
- 4,452
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 24 | 0 |
| 1977 | 25 | 0 |
| 1978 | 16 | 0 |
| 1979 | 5 | 0 |
| 1980 | 11 | 0 |
| 1981 | 22 | 0 |
| 1982 | 15 | 0 |
| 1983 | 16 | 0 |
| 1984 | 34 | 0 |
| 1985 | 48 | 0 |
| 1986 | 33 | 0 |
| 1987 | 30 | 0 |
| 1988 | 24 | 0 |
| 1989 | 33 | 0 |
| 1990 | 32 | 0 |
| 1991 | 27 | 0 |
| 1992 | 19 | 0 |
| 1993 | 26 | 0 |
| 1994 | 30 | 0 |
| 1995 | 21 | 0 |
| 1996 | 27 | 0 |
| 1997 | 29 | 0 |
| 1998 | 28 | 0 |
| 1999 | 22 | 0 |
| 2000 | 17 | 0 |
| 2001 | 26 | 15 |
| 2002 | 29 | 61 |
| 2003 | 35 | 95 |
| 2004 | 45 | 79 |
| 2005 | 45 | 72 |
| 2006 | 66 | 83 |
| 2007 | 42 | 77 |
| 2008 | 39 | 79 |
| 2009 | 40 | 98 |
| 2010 | 79 | 92 |
| 2011 | 51 | 67 |
| 2012 | 47 | 69 |
| 2013 | 44 | 70 |
| 2014 | 48 | 84 |
| 2015 | 56 | 95 |
| 2016 | 72 | 98 |
| 2017 | 78 | 97 |
| 2018 | 63 | 83 |
| 2019 | 71 | 121 |
| 2020 | 66 | 104 |
| 2021 | 77 | 96 |
| 2022 | 76 | 83 |
| 2023 | 67 | 85 |
| 2024 | 87 | 89 |
| 2025 | 57 | 62 |
| 2026 | 31 | 32 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Carbon fiber bundle containing sizing agent and method for producing same15 Sep 2026US 12,735,813 B2Toray Industries, Inc.
- Pitch-based ultrafine carbon fibers and pitch-based ultrafine carbon fiber dispersion15 Sep 2026US 12,735,814 B2Teijin Limited
- Laser writing in ambient conditions for carbonization of synthetic polymers, including nanostructured polymers treated in alkaline media15 Sep 2026US 12,735,815 B2Fondazione Istituto Italiano Di Technologia 5%
- Block copolymer porous carbon fibers and uses thereof25 Aug 2026US 12,715,819 B2Virginia Tech Intellectual Properties, Inc.
- Continuous fibres based on cellulose and/or cellulose derivatives, method for the production thereof and use thereof25 Aug 2026US 12,716,148 B2Centrotherm International AG
- Treatment agent for acrylic fibers and use of the same8 Oct 2026US 2026/0308815 A1Matsumoto Yushi-Seiyaku Co., Ltd.
- Carbon fiber precursor fiber bundle, thermally-stabilized fiber bundle, production method thereof, and method for producing carbon fiber bundle24 Sep 2026US 2026/0286575 A1Kabushiki Kaisha Toyota Chuo Kenkyusho
- Method of making polyacrylonitrile based carbon fibers and polyacrylonitrile based carbon fiber fabric24 Sep 2026US 2026/0286576 A1University of Kentucky Research Foundation
- Refining and/or petrochemical facility and apparatus for heating fluids in processes related to refining and petrochemical industries using rotary generated thermal energy17 Sep 2026US 2026/0274747 A1Coolbrook Oy
- Composite carbon-fiber wire and method for manufacturing the same17 Sep 2026US 2026/0275585 A1Yi Shen Plastic Corp.
Most cited
By later US patents
- Carbide nanomaterials684US 6,190,634 B1President and Fellows of Harvard College · 2001
- Production of metal ion containing carbon fibers useful in electron shielding applications454US 3,997,638 ACelanese Corporation · 1976
- Carbon fibrils, method for producing same and compositions containing same361US 4,663,230 AHyperion Catalysis International, Inc. · 1987
- Nanotube films and articles330US 6,706,402 B2Nantero, Inc. · 2004
- Method of producing carbon nanotubes254US 6,333,016 B1The Board of Regents of the University of Oklahoma · 2001