D01D 5/24
Formation of filaments, threads, or the like: with a hollow structure
Official title: with a hollow structure; Spinnerette packs therefor (D01D5/38 takes precedence; producing tubes of plastic material B29D; addition of agents forming hollow filaments D01F1/08)
D01D5/24 (Formation of filaments, threads, or the like: with a hollow structure) appears on 726 US grants and 568 published applications in this corpus.
Search patents in D01D- Granted patents
- 726
- Published applications
- 568
- Assignees
- 416
- Inventors
- 1,774
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 9 | 0 |
| 1978 | 9 | 0 |
| 1979 | 2 | 0 |
| 1980 | 12 | 0 |
| 1981 | 19 | 0 |
| 1982 | 24 | 0 |
| 1983 | 15 | 0 |
| 1984 | 16 | 0 |
| 1985 | 18 | 0 |
| 1986 | 9 | 0 |
| 1987 | 9 | 0 |
| 1988 | 14 | 0 |
| 1989 | 23 | 0 |
| 1990 | 12 | 0 |
| 1991 | 13 | 0 |
| 1992 | 16 | 0 |
| 1993 | 23 | 0 |
| 1994 | 23 | 0 |
| 1995 | 15 | 0 |
| 1996 | 21 | 0 |
| 1997 | 14 | 0 |
| 1998 | 12 | 0 |
| 1999 | 14 | 0 |
| 2000 | 17 | 0 |
| 2001 | 6 | 3 |
| 2002 | 13 | 16 |
| 2003 | 16 | 24 |
| 2004 | 17 | 16 |
| 2005 | 9 | 23 |
| 2006 | 10 | 18 |
| 2007 | 6 | 9 |
| 2008 | 4 | 14 |
| 2009 | 4 | 21 |
| 2010 | 7 | 22 |
| 2011 | 5 | 17 |
| 2012 | 12 | 21 |
| 2013 | 14 | 34 |
| 2014 | 13 | 16 |
| 2015 | 12 | 28 |
| 2016 | 13 | 29 |
| 2017 | 19 | 31 |
| 2018 | 18 | 23 |
| 2019 | 16 | 28 |
| 2020 | 20 | 28 |
| 2021 | 28 | 31 |
| 2022 | 16 | 30 |
| 2023 | 23 | 32 |
| 2024 | 23 | 24 |
| 2025 | 19 | 18 |
| 2026 | 19 | 12 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Hollow fiber membrane material for high-humidification hydrogen fuel cell humidifier and preparation method and application thereof6 Oct 2026US 12,753,530 B2University of Electronic Science and Technology of China
- Microporous polyethylene filaments29 Sep 2026US 12,747,519 B2W. L. Gore & Associates, Inc.
- Self-adaptive fabric for space applications29 Sep 2026US 12,747,522 B2Blue Origin Manufacturing, LLC
- Block copolymer porous carbon fibers and uses thereof25 Aug 2026US 12,715,819 B2Virginia Tech Intellectual Properties, Inc.
- Fiber11 Aug 2026US 12,703,931 B2OceanSafe AG
- Encapsulant-containing polymer capsules and fibers and composites including same8 Oct 2026US 2026/0308808 A1Arizona Board of Regents on behalf of Arizona State University
- Roll-to-roll processing of hierarchically porous acrylic fibers through guided spinodal decomposition8 Oct 2026US 2026/0308812 A1
- Hollow fiber and a process for preparation thereof10 Sep 2026US 2026/0264024 A1
- On-line drying of hollow fiber membranes30 Jul 2026US 2026/0216658 A1
- Trilobal filaments and spinnerets for producing the same2 Jul 2026US 2026/0185270 A1Aladdin Manufacturing Corporation
Most cited
By later US patents
- Synthetic fibers for medical use and method of making the same203US 6,551,353 B1Hills, Inc. · 2003
- Hollow fiber membranes and method of manufacture123US 5,762,798 AMinntech Corporation · 1998
- Microporous hollow fiber and process and apparatus for preparing such fiber121US 4,405,688 ACelanese Corporation · 1983
- Particle-filled microporous materials109US 4,957,943 AMinnesota Mining and Manufacturing Company · 1990
- Hollow fiber membrane for plasma separation106US 4,708,799 A1987