D01F 6/54
Of polymers of unsaturated nitriles
Official title: of polymers of unsaturated nitriles
D01F6/54 (Of polymers of unsaturated nitriles) appears on 95 US grants and 75 published applications in this corpus.
Search patents in D01F- Granted patents
- 95
- Published applications
- 75
- Assignees
- 71
- Inventors
- 296
- Latest grant
- 21 Oct 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 6 | 0 |
| 1978 | 2 | 0 |
| 1979 | 4 | 0 |
| 1980 | 3 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 2 | 0 |
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 2 | 0 |
| 2004 | 1 | 2 |
| 2005 | 1 | 1 |
| 2006 | 0 | 2 |
| 2007 | 0 | 3 |
| 2008 | 1 | 0 |
| 2009 | 1 | 0 |
| 2010 | 0 | 1 |
| 2011 | 0 | 1 |
| 2012 | 0 | 4 |
| 2013 | 0 | 0 |
| 2014 | 2 | 2 |
| 2015 | 5 | 3 |
| 2016 | 1 | 3 |
| 2017 | 2 | 5 |
| 2018 | 3 | 6 |
| 2019 | 1 | 8 |
| 2020 | 7 | 3 |
| 2021 | 3 | 3 |
| 2022 | 1 | 7 |
| 2023 | 2 | 3 |
| 2024 | 7 | 7 |
| 2025 | 3 | 10 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Enhanced flash evaporation/electrospinning composite spinning equipment21 Oct 2025US 12,448,709 B2Shanghai Xunjiang Technology Co., Ltd.
- Porous multi-metal oxide nanotubes and production method therefor7 Oct 2025US 12,435,449 B2Daegu Gyeongbuk Institute of Science and Technology
- Fiber for artificial hair and hair accessory product16 Sep 2025US 12,415,917 B2Denka Company Limited
- Flame-retardant fiber composite and flame-retardant working clothes19 Nov 2024US 12,144,389 B2Kaneka Corporation
- Method of preparing PAN-based carbon fibers15 Oct 2024US 12,116,703 B2Hi- Tech Fiber Group Corporation
- Negative electrode active material for rechargeable lithium battery, method for preparing the same, negative electrode including the same, and rechargeable lithium battery including the same15 Jan 2026US 2026/0018612 A1Samsung SDI.Co., Ltd.
- Modacrylic fiber, flame-retardant fiber assembly containing same, and method for manufacturing same25 Dec 2025US 2025/0389059 A1Kaneka Corporation
- Double-layer functionalized hollow fiber membrane and preparation method thereof18 Dec 2025US 2025/0382728 A1Harbin Engineering University
- Modacrylic fiber and flame-retardant fiber assembly including same18 Dec 2025US 2025/0382729 A1Kaneka Corporation
- Process for making pure, blended, and coaxial fire-resistant nanofibers28 Aug 2025US 2025/0270738 A1D.J. Irvin Company, LLC
Most cited
By later US patents
- Pile composition having expanded fibers49US 4,788,093 AKanegafuchi Kagaku Kogyo Kabushiki Kaisha · 1988
- Process for spin-dyeing of acid-modified polymers of acrylonitrile by the wet-spinning procedure using quaternary ammonium or cyclammonium dyestuffs of low M value and high cation weight having two or three said ammonium or cyclammonium groups23US 4,557,732 AHoechst Aktiengesellschaft · 1985
- Production of stabilized non-burning acrylic fibers and films17US 4,002,426 ACelanese Corporation · 1977
- Polyacrylonitrile fibers having a natural crimp and process for producing the same15US 3,984,515 AAkzo Belge S.A. · 1976
- Modification of continuous carbon fibers during precursor formation for composites having enhanced moldability15US 9,896,783 B2GM Global Technology Operations LLC · 2018