D01F 6/38
Comprising unsaturated nitriles as the major constituent
Official title: comprising unsaturated nitriles as the major constituent
D01F6/38 (Comprising unsaturated nitriles as the major constituent) appears on 144 US grants and 165 published applications in this corpus.
Search patents in D01F- Granted patents
- 144
- Published applications
- 165
- Assignees
- 82
- Inventors
- 443
- Latest grant
- 7 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 4 | 0 |
| 1978 | 6 | 0 |
| 1979 | 2 | 0 |
| 1980 | 8 | 0 |
| 1981 | 1 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 1 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 0 | 1 |
| 2003 | 2 | 4 |
| 2004 | 3 | 5 |
| 2005 | 2 | 4 |
| 2006 | 0 | 1 |
| 2007 | 0 | 5 |
| 2008 | 0 | 2 |
| 2009 | 1 | 5 |
| 2010 | 0 | 3 |
| 2011 | 2 | 6 |
| 2012 | 4 | 6 |
| 2013 | 2 | 7 |
| 2014 | 2 | 2 |
| 2015 | 6 | 12 |
| 2016 | 4 | 5 |
| 2017 | 4 | 8 |
| 2018 | 5 | 8 |
| 2019 | 6 | 10 |
| 2020 | 10 | 13 |
| 2021 | 4 | 13 |
| 2022 | 10 | 11 |
| 2023 | 4 | 10 |
| 2024 | 14 | 7 |
| 2025 | 7 | 11 |
| 2026 | 1 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Nanofiber for air filter comprising random copolymer having zwitterionic functional group and method for manufacturing same7 Apr 2026US 12,594,514 B2Gwangju Institute of Science and Technology
- Manufacturing method for carbon fiber30 Dec 2025US 12,509,804 B2Formosa Plastics Corporation
- Carbon fiber precursor fiber, fiber for carbon fiber precursor fiber, method of producing carbon fiber precursor fiber, method of producing stabilized fiber, and method of producing carbon fiber23 Dec 2025US 12,503,795 B2Kabushiki Kaisha Toyota Chuo Kenkyusho
- Method for manufacturing precursor fiber bundle, method for manufacturing carbon fiber bundle, and carbon fiber bundle7 Oct 2025US 12,435,451 B2Teijin Limited
- Additive for thermal production and reinforcement of carbon fiber, and carbon fiber prepared there from23 Sep 2025US 12,421,631 B2Board of Regents, The University of Texas System
- Copolymer composition, method for producing same, and molded article obtained using copolymer composition10 Sep 2026US 2026/0265433 A1Kuraray Co., Ltd.
- Production method for carbon fiber precursor fibers3 Sep 2026US 2026/0258580 A1Teijin Limited
- 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
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
- Melt-spinning acrylonitrile polymer fibers39US 4,163,770 AAmerican Cyanamid Company · 1979
- Acrylonitrile polymer filaments29US 3,984,601 AE. I. Du Pont de Nemours and Company · 1976
- Polyacrylonitrile fibers having a natural crimp and process for producing the same15US 3,984,515 AAkzo Belge S.A. · 1976
- Spin-dyeing of acrylonitrile homopolymers and copolymers14US 3,996,192 AHoechst Aktiengesellschaft · 1976