D01G 9/00
Opening or cleaning fibres
Official title: Opening or cleaning fibres, e.g. scutching cotton (scutching flax or like fibres D01B; making cellulose wadding in papermaking machines D21F11/14)
D01G9/00 (Opening or cleaning fibres) appears on 180 US grants and 84 published applications in this corpus.
Search patents in D01G- Granted patents
- 180
- Published applications
- 84
- Assignees
- 92
- Inventors
- 308
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 5 | 0 |
| 1980 | 5 | 0 |
| 1981 | 2 | 0 |
| 1982 | 2 | 0 |
| 1983 | 1 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 2 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 6 | 0 |
| 1990 | 6 | 0 |
| 1991 | 11 | 0 |
| 1992 | 11 | 0 |
| 1993 | 6 | 0 |
| 1994 | 8 | 0 |
| 1995 | 2 | 0 |
| 1996 | 3 | 0 |
| 1997 | 6 | 0 |
| 1998 | 2 | 0 |
| 1999 | 0 | 0 |
| 2000 | 5 | 0 |
| 2001 | 8 | 0 |
| 2002 | 5 | 4 |
| 2003 | 5 | 2 |
| 2004 | 1 | 3 |
| 2005 | 0 | 0 |
| 2006 | 2 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 4 |
| 2010 | 3 | 3 |
| 2011 | 1 | 1 |
| 2012 | 1 | 1 |
| 2013 | 0 | 1 |
| 2014 | 0 | 1 |
| 2015 | 3 | 4 |
| 2016 | 2 | 2 |
| 2017 | 2 | 6 |
| 2018 | 3 | 7 |
| 2019 | 4 | 10 |
| 2020 | 7 | 4 |
| 2021 | 3 | 5 |
| 2022 | 4 | 7 |
| 2023 | 7 | 5 |
| 2024 | 5 | 5 |
| 2025 | 7 | 4 |
| 2026 | 1 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- D01G 9/14Details of machines or apparatus71
- D01G 9/08Opening or cleaning fibres: by means of air draught arrangements59
- D01G 9/06Opening or cleaning fibres: by means of toothed members40
- D01G 9/04Opening or cleaning fibres: by means of beater arms21
- D01G 9/12Combinations of opening or cleaning machines12
- D01G 9/02Opening or cleaning fibres: by agitation within a moving receptacle3
Recent patents
- Fireproof material used for lithium battery module and method for producing the same19 May 2026US 12,629,915 B2Nan Ya Plastics Corporation
- Method and apparatus for rinsing coir16 Dec 2025US 12,497,715 B2Genus Industries, Inc.
- Device for preparing an insulation product made from wool, in particular mineral wool14 Oct 2025US 12,442,201 B2Saint-Gobain Isover
- Growing medium and mulch fiber opening apparatus5 Aug 2025US 12,378,703 B2Profile Products L.L.C.
- Method for preparing an insulating product based on wool, in particular mineral wool1 Jul 2025US 12,344,977 B2Saint-Gobain Isover
- Cleaned, non-scoured, cotton and methods of preparing the same8 Oct 2026US 2026/0308837 A1Barnhardt Manufacturing Company
- Papermaking mat, wound body, and method for producing paper making mat3 Sep 2026US 2026/0258586 A1Ibiden Co., Ltd.
- Fiber opening apparatus11 Jun 2026US 2026/0159996 A1Profile Products L.L.C.
- Particle-containing fiber bundle production method and particle-containing fiber bundle20 Nov 2025US 2025/0353993 A1Mitsubishi Chemical Corporation
- Recycled carbon fiber nonwoven fabric manufacturing system including chute carding machine30 Oct 2025US 2025/0333885 A1Sdac Co, Ltd
Most cited
By later US patents
- Total fiber recovery method and apparatus39US 4,300,267 ACotton Incorporated · 1981
- Method and apparatus for recognizing foreign substances in and separating them from a pneumatically conveyed fiber stream38US 6,087,608 ATrutzschler GmbH & Co. KG · 2000
- Cloth scrap recycling method33US 5,481,864 A1996
- Multi-filament split-yarn sheet and method and device for the manufacture thereof29US 6,032,342 AFukui Prefecture · 2000
- Apparatus and methods for aeromechanical and electrodynamic release and separation of foreign matter from fiber28US 4,512,060 APPM, Inc. · 1985