D01F 9/225
From stabilised polyacrylonitriles
Official title: {from stabilised polyacrylonitriles}
D01F9/225 (From stabilised polyacrylonitriles) appears on 153 US grants and 181 published applications in this corpus.
Search patents in D01F- Granted patents
- 153
- Published applications
- 181
- Assignees
- 81
- Inventors
- 421
- Latest grant
- 3 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 3 | 0 |
| 1985 | 2 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 3 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 1 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 1 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 2 |
| 2008 | 0 | 1 |
| 2009 | 1 | 4 |
| 2010 | 4 | 7 |
| 2011 | 1 | 6 |
| 2012 | 4 | 5 |
| 2013 | 3 | 7 |
| 2014 | 6 | 7 |
| 2015 | 5 | 14 |
| 2016 | 5 | 13 |
| 2017 | 10 | 12 |
| 2018 | 6 | 4 |
| 2019 | 9 | 15 |
| 2020 | 4 | 16 |
| 2021 | 8 | 21 |
| 2022 | 14 | 11 |
| 2023 | 8 | 6 |
| 2024 | 14 | 12 |
| 2025 | 11 | 12 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Carbon fiber and method of manufacturing same3 Mar 2026US 12,565,719 B2Toray Industries, Inc.
- Production method for precarbonized fiber bundle, production method for carbon fiber bundle, and precarbonization furnace6 Jan 2026US 12,516,451 B2Toray Industries, Inc.
- Method for manufacturing precursor fiber bundle, method for manufacturing carbon fiber bundle, and carbon fiber bundle7 Oct 2025US 12,435,451 B2Teijin Limited
- Polyacrylonitrile-based stabilized fiber, carbon fiber, and manufacturing method therefor9 Sep 2025US 12,410,542 B2Hs Hyosung Advanced Materials Corporation
- Method and device for stabilizing precursor fibers or films for producing carbon fibers or films5 Aug 2025US 12,378,701 B2Centrotherm International AG
- Treatment agent for acrylic fibers and use of the same8 Oct 2026US 2026/0308815 A1Matsumoto Yushi-Seiyaku Co., Ltd.
- Preparation method of high-temperature-resistant polyacrylonitrile-based carbon fibre and its application in fireproof fabric13 Aug 2026US 2026/0234839 A1Wuxi Tanyan Technology Co., Ltd.
- Carbon fiber bundle and method for producing carbon fiber bundle2 Jul 2026US 2026/0185272 A1Mitsubishi Chemical Corporation
- Carbon fiber bundle and method for producing carbon fiber bundle5 Mar 2026US 2026/0062839 A1Mitsubishi Chemical Corporation
- Process for preparing a carbon fiber precursor4 Dec 2025US 2025/0369158 A1
Most cited
By later US patents
- 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
- Method of making carbon fibers and resin-impregnated carbon fibers43US 4,100,004 ASecuricum S.A. · 1978
- Method for fabricating a carbon electrode substrate26US 4,115,528 AUnited Technologies Corporation · 1978
- Electrically conductive thermally stabilized acrylic fibrous material and process for preparing same25US 4,781,971 AHoechst Celanese Corporation · 1988
- Partially-carbonized polyacrylonitrile filter24US 4,444,574 A1984