D01F 6/90
Of polyamides
Official title: of polyamides
D01F6/90 (Of polyamides) appears on 240 US grants and 263 published applications in this corpus.
Search patents in D01F- Granted patents
- 240
- Published applications
- 263
- Assignees
- 161
- Inventors
- 655
- Latest grant
- 17 Mar 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 4 | 0 |
| 1990 | 0 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 6 | 0 |
| 1994 | 4 | 0 |
| 1995 | 7 | 0 |
| 1996 | 10 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 15 | 0 |
| 2000 | 7 | 0 |
| 2001 | 4 | 2 |
| 2002 | 3 | 8 |
| 2003 | 1 | 8 |
| 2004 | 10 | 18 |
| 2005 | 5 | 6 |
| 2006 | 6 | 9 |
| 2007 | 6 | 13 |
| 2008 | 8 | 11 |
| 2009 | 0 | 6 |
| 2010 | 5 | 5 |
| 2011 | 5 | 7 |
| 2012 | 6 | 9 |
| 2013 | 6 | 11 |
| 2014 | 3 | 9 |
| 2015 | 1 | 13 |
| 2016 | 4 | 11 |
| 2017 | 10 | 11 |
| 2018 | 7 | 12 |
| 2019 | 7 | 12 |
| 2020 | 6 | 16 |
| 2021 | 6 | 13 |
| 2022 | 8 | 8 |
| 2023 | 10 | 17 |
| 2024 | 6 | 10 |
| 2025 | 8 | 13 |
| 2026 | 2 | 5 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Flame-resistant garments and fabrics with yarns comprising a polymer blend of meta-aramid and polyvinylpyrrolidone17 Mar 2026US 12,577,397 B2Dupont Safety & Construction, Inc.
- Artificial hair fiber17 Mar 2026US 12,577,707 B2Denka Company Limited
- High-elongation meta-aramid fiber, preparation method and apparatus30 Dec 2025US 12,509,803 B2Tayho Advanced Materials Group Co., Ltd.
- Fire retardant nylon fibers and methods for making them23 Dec 2025US 12,503,793 B2Brookwood Companies Incorporated
- Continuous process for recycling11 Nov 2025US 12,467,162 B2Teijin Aramid B.V.
- Recombinant polypeptide23 Jul 2026US 2026/0209287 A1Humble Bee Limited
- Helical artificial turf fiber with anti-splicing agent7 May 2026US 2026/0125826 A1Polytex Sportbelage Produktions-GmbH
- Helical artificial turf fiber with different polymers in core and periphery7 May 2026US 2026/0125828 A1Polytex Sportbelage Produktions-GmbH
- Artificial turf with traction control agent7 May 2026US 2026/0125858 A1Polytex Sportbelage Produktions-GmbH
- Fire retardant nylon fibers and methods for making them19 Mar 2026US 2026/0078532 A1Brookwood Companies Incorporated
Most cited
By later US patents
- Air filtration arrangements having fluted media constructions and methods381US 6,673,136 B2Donaldson Company, Inc. · 2004
- Polymer, polymer microfiber, polymer nanofiber and applications including filter structures252US 6,743,273 B2Donaldson Company, Inc. · 2004
- Process if making fine fiber material131US 6,955,775 B2Donaldson Company, Inc. · 2005
- Water-dispersable materials121US 6,211,309 B1BASF SE · 2001
- Methods for filtering air for a gas turbine system121US 6,875,256 B2Donaldson Company, Inc. · 2005