D21H 5/20
Of organic non-cellulosic fibres too short for spinning, with or without cellulose
Official title: {of organic non-cellulosic fibres too short for spinning, with or without cellulose fibres}
D21H5/20 (Of organic non-cellulosic fibres too short for spinning, with or without cellulose) appears on 68 US grants and 5 published applications in this corpus.
Search patents in D21H- Granted patents
- 68
- Published applications
- 5
- Assignees
- 39
- Inventors
- 132
- Latest grant
- 8 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 9 | 0 |
| 1977 | 4 | 0 |
| 1978 | 7 | 0 |
| 1979 | 7 | 0 |
| 1980 | 5 | 0 |
| 1981 | 6 | 0 |
| 1982 | 2 | 0 |
| 1983 | 6 | 0 |
| 1984 | 4 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 1 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 1 |
| 2016 | 0 | 0 |
| 2017 | 0 | 0 |
| 2018 | 1 | 0 |
| 2019 | 0 | 1 |
| 2020 | 0 | 1 |
| 2021 | 1 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 0 |
| 2024 | 0 | 0 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Sustainably-sourced, high strength non woven8 Jul 2025US 12,351,987 B2Fybervek Holdings LLC
- Separator and non-aqueous electrolyte battery16 Nov 2021US 11,177,535 B2Maxell Holdings, Ltd.
- Electrical insulating paper20 Mar 2018US 9,922,750 B2Teijin Aramid B.V.
- Fibrillated fibers and articles made therefrom9 Mar 1993US 5,192,604 AAmerican Cyanamid Company
- Fibrillated fibers and articles made therefrom19 Jan 1993US 5,180,630 AAmerican Cyanamid Company
- Sustainably-Sourced, High Strength Non Woven25 Sep 2025US 2025/0297427 A1Fybervek Holdings LLC
- Sustainably-Sourced, High Strength Non Woven17 Nov 2022US 2022/0364307 A1Fybervek Holdings LLC
- Paper sheet mulches and methods of making the same12 Nov 2020US 2020/0354892 A1GPCP IP Holdings LLC
- Separator and non-aqueous electrolyte battery25 Jul 2019US 2019/0229317 A1Maxell Holdings, Ltd.
- Electrical insulating paper5 Nov 2015US 2015/0318078 A1Teijin Aramid B.V.
Most cited
By later US patents
- Fibrillated fibers and articles made therefrom100US 5,180,630 AAmerican Cyanamid Company · 1993
- Heat-adhesive composite fibers65US 4,234,655 AChisso Corporation · 1980
- Preparation of hydrophilic polyolefin fibers for use in papermaking65US 4,496,427 AHercules Incorporated · 1985
- Non-woven fabric of hot-melt adhesive composite fibers57US 4,477,516 AChisso Corporation · 1984
- Fibrillated fibers and articles made therefrom46US 4,929,502 AAmerican Cyanamid Company · 1990