D21H 23/20
Apparatus therefor
D21H23/20 (Apparatus therefor) appears on 28 US grants and 35 published applications in this corpus.
Search patents in D21H- Granted patents
- 28
- Published applications
- 35
- Assignees
- 23
- Inventors
- 85
- Latest grant
- 4 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1989 | 1 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 2 |
| 2003 | 1 | 0 |
| 2004 | 2 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 0 |
| 2007 | 1 | 3 |
| 2008 | 0 | 0 |
| 2009 | 1 | 1 |
| 2010 | 1 | 1 |
| 2011 | 1 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 2 |
| 2016 | 1 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 1 |
| 2019 | 1 | 4 |
| 2020 | 1 | 5 |
| 2021 | 4 | 10 |
| 2022 | 4 | 0 |
| 2023 | 2 | 1 |
| 2024 | 0 | 1 |
| 2025 | 0 | 2 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method, apparatus, and system of a fibrillated nanocellulose material4 Aug 2026US 12,698,596 B2Ecoinno (H.K.) Limited
- Dosing of nanocellulose suspension in gel phase14 Feb 2023US 11,578,463 B2Stora Enso OYJ
- Fiber assembly-forming method and fiber assembly-forming apparatus31 Jan 2023US 11,566,378 B2Seiko Epson Corporation
- Cellulose and cellulose ester film13 Dec 2022US 11,525,215 B2Eastman Chemical Company
- Method of and an arrangement for adding at least one additional stock component to an approach flow system of a fiber web machine4 Oct 2022US 11,459,700 B2Valmet Technologies Oy
- Method and reactor for producing produce calcium carbonate27 Feb 2025US 2025/0066215 A1Wetend Technologies Oy
- Artificial leather and manufacture method thereof30 Jan 2025US 2025/0034800 A1Taiwan Textile Research Institute
- System and method of manufacture of cellulose insulation19 Sep 2024US 2024/0309584 A1Ntip LLC
- Method, apparatus, and system of a fibrillated nanocellulose material15 Jun 2023US 2023/0183924 A1Ecoinno (H.K.) Limited
- Starch composite for binding fibers, fiber structure, and fiber structure-manufacturing apparatus25 Nov 2021US 2021/0363700 A1Seiko Epson Corporation
Most cited
By later US patents
- Method for manufacturing filler-containing paper81US 4,889,594 AMo och Domsjo Aktiebolag · 1989
- Apparatus for crosslinking individualized cellulose fibers48US 5,437,418 AWeyerhaeuser Company · 1995
- Method and arrangement for feeding chemicals into a process stream31US 7,550,060 B2Nalco Company · 2009
- Method and apparatus for crosslinking individualized cellulose fibers27US 6,436,231 B1Weyerhaeuser Company · 2002
- Method and apparatus for feeding a chemical into a liquid flow26US 6,659,636 B1Wetend Technologies Oy · 2003