D01F 9/22
From polyacrylonitriles
Official title: from polyacrylonitriles
D01F9/22 (From polyacrylonitriles) appears on 459 US grants and 430 published applications in this corpus.
Search patents in D01F- Granted patents
- 459
- Published applications
- 430
- Assignees
- 203
- Inventors
- 1,044
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 14 | 0 |
| 1978 | 12 | 0 |
| 1979 | 1 | 0 |
| 1980 | 4 | 0 |
| 1981 | 8 | 0 |
| 1982 | 7 | 0 |
| 1983 | 6 | 0 |
| 1984 | 6 | 0 |
| 1985 | 14 | 0 |
| 1986 | 6 | 0 |
| 1987 | 9 | 0 |
| 1988 | 8 | 0 |
| 1989 | 8 | 0 |
| 1990 | 10 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 7 | 0 |
| 1994 | 11 | 0 |
| 1995 | 2 | 0 |
| 1996 | 8 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 5 | 0 |
| 2001 | 6 | 3 |
| 2002 | 6 | 2 |
| 2003 | 6 | 5 |
| 2004 | 2 | 4 |
| 2005 | 1 | 4 |
| 2006 | 0 | 1 |
| 2007 | 1 | 6 |
| 2008 | 2 | 4 |
| 2009 | 3 | 7 |
| 2010 | 7 | 16 |
| 2011 | 5 | 15 |
| 2012 | 7 | 14 |
| 2013 | 6 | 16 |
| 2014 | 16 | 18 |
| 2015 | 10 | 22 |
| 2016 | 13 | 24 |
| 2017 | 19 | 29 |
| 2018 | 18 | 15 |
| 2019 | 16 | 40 |
| 2020 | 14 | 33 |
| 2021 | 21 | 35 |
| 2022 | 21 | 26 |
| 2023 | 19 | 29 |
| 2024 | 31 | 27 |
| 2025 | 20 | 22 |
| 2026 | 11 | 13 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- 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.
- Flexible implantable electrode arrangement and production method18 Aug 2026US 12,708,305 B2Albert-Ludwigs-Universität Freiburg
- Method and apparatus for manufacturing cement using rotary generated thermal energy28 Jul 2026US 12,692,192 B2Coolbrook Oy
- Carbon fiber, manufacturing method thereof, and carbon fiber composite material16 Jun 2026US 12,655,542 B2Toray Industries, Inc.
- Treatment agent for acrylic fibers and use of the same8 Oct 2026US 2026/0308815 A1Matsumoto Yushi-Seiyaku Co., Ltd.
- 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
- Production method for carbon fiber precursor fibers3 Sep 2026US 2026/0258580 A1Teijin Limited
- Carbon composite material20 Aug 2026US 2026/0245875 A1Toyota Jidosha Kabushiki Kaisha
Most cited
By later US patents
- Production of metal ion containing carbon fibers useful in electron shielding applications454US 3,997,638 ACelanese Corporation · 1976
- High modulus, high strength carbon fibers produced from mesophase pitch102US 4,005,183 AUnion Carbide Corporation · 1977
- Process and apparatus for the production of nanofibers101US 6,695,992 B2The University of Akron · 2004
- Macroscopic fiber comprising single-wall carbon nanotubes and acrylonitrile-based polymer and process for making the same99US 6,852,410 B2Georgia Tech Research Corporation · 2005
- Flexible carbon fiber, carbon fiber electrode and secondary energy storage devices65US 5,518,836 A1996