D01F 6/18
From polymers of unsaturated nitriles
Official title: from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
D01F6/18 (From polymers of unsaturated nitriles) appears on 305 US grants and 258 published applications in this corpus.
Search patents in D01F- Granted patents
- 305
- Published applications
- 258
- Assignees
- 161
- Inventors
- 814
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 5 | 0 |
| 1978 | 9 | 0 |
| 1979 | 5 | 0 |
| 1980 | 6 | 0 |
| 1981 | 12 | 0 |
| 1982 | 6 | 0 |
| 1983 | 5 | 0 |
| 1984 | 12 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 6 | 0 |
| 1988 | 1 | 0 |
| 1989 | 9 | 0 |
| 1990 | 11 | 0 |
| 1991 | 5 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 8 | 0 |
| 1995 | 7 | 0 |
| 1996 | 5 | 0 |
| 1997 | 1 | 0 |
| 1998 | 6 | 0 |
| 1999 | 4 | 0 |
| 2000 | 3 | 0 |
| 2001 | 6 | 5 |
| 2002 | 5 | 4 |
| 2003 | 6 | 6 |
| 2004 | 3 | 5 |
| 2005 | 1 | 4 |
| 2006 | 0 | 2 |
| 2007 | 2 | 4 |
| 2008 | 1 | 4 |
| 2009 | 1 | 8 |
| 2010 | 1 | 6 |
| 2011 | 5 | 6 |
| 2012 | 4 | 10 |
| 2013 | 2 | 5 |
| 2014 | 9 | 7 |
| 2015 | 4 | 15 |
| 2016 | 9 | 12 |
| 2017 | 9 | 4 |
| 2018 | 4 | 13 |
| 2019 | 3 | 19 |
| 2020 | 5 | 18 |
| 2021 | 11 | 19 |
| 2022 | 13 | 23 |
| 2023 | 9 | 12 |
| 2024 | 19 | 21 |
| 2025 | 17 | 14 |
| 2026 | 4 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Shark skin biomimetic fabrics for functional clothing16 Jun 2026US 12,655,541 B2Colorado State University Research Foundation
- Carbon fiber, manufacturing method thereof, and carbon fiber composite material16 Jun 2026US 12,655,542 B2Toray Industries, Inc.
- Polymer-derived ceramic fibers and methods of preparing the same14 Apr 2026US 12,600,676 B2Kansas State University Research Foundation
- Carbon fiber and method of manufacturing same3 Mar 2026US 12,565,719 B2Toray Industries, Inc.
- Manufacturing method for carbon fiber30 Dec 2025US 12,509,804 B2Formosa Plastics Corporation
- Roll-to-roll processing of hierarchically porous acrylic fibers through guided spinodal decomposition8 Oct 2026US 2026/0308812 A1
- 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
- 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.
- Polyacrylonitrile-based carbon fiber, dope and preparation process thereof23 Jul 2026US 2026/0209999 A1China Petroleum & Chemical Corporation
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
- Process for preparing subdenier fibers, pulp-like short fibers, fibrids, rovings and mats from isotropic polymer solutions42US 5,296,286 AE. I. Du Pont de Nemours and Company · 1994
- Melt-spinning acrylonitrile polymer fibers39US 4,163,770 AAmerican Cyanamid Company · 1979
- High strength polyacrylonitrile fiber and method of producing the same39US 4,535,027 AJapan Exlan Company Limited · 1985
- Method of manufacturing shaped articles from crystalline acrylonitrile polymers and copolymers35US 4,173,606 ACeskoslovenska akademie ved · 1979