D21H 11/14
Secondary fibres
Official title: Secondary fibres (working-up waste paper D21C5/02)
D21H11/14 (Secondary fibres) appears on 401 US grants and 457 published applications in this corpus.
Search patents in D21H- Granted patents
- 401
- Published applications
- 457
- Assignees
- 242
- Inventors
- 969
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 3 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 2 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 5 | 0 |
| 1996 | 10 | 0 |
| 1997 | 10 | 0 |
| 1998 | 14 | 0 |
| 1999 | 10 | 0 |
| 2000 | 8 | 0 |
| 2001 | 13 | 0 |
| 2002 | 9 | 10 |
| 2003 | 7 | 7 |
| 2004 | 4 | 10 |
| 2005 | 5 | 8 |
| 2006 | 4 | 10 |
| 2007 | 1 | 4 |
| 2008 | 4 | 9 |
| 2009 | 2 | 3 |
| 2010 | 3 | 9 |
| 2011 | 7 | 13 |
| 2012 | 6 | 9 |
| 2013 | 12 | 12 |
| 2014 | 13 | 19 |
| 2015 | 8 | 20 |
| 2016 | 10 | 13 |
| 2017 | 16 | 24 |
| 2018 | 19 | 30 |
| 2019 | 11 | 20 |
| 2020 | 29 | 45 |
| 2021 | 15 | 29 |
| 2022 | 27 | 26 |
| 2023 | 16 | 38 |
| 2024 | 27 | 41 |
| 2025 | 24 | 31 |
| 2026 | 18 | 17 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Fibrous body processing apparatus6 Oct 2026US 12,753,550 B2Seiko Epson Corporation
- Barrier paper or barrier film comprising highly refined pulp from fibers obtained from used beverage cartons25 Aug 2026US 12,716,173 B2Stora Enso OYJ
- HPMC composition for coating of paper and board for reducing migration of mineral oil hydrocarbons (MOH)4 Aug 2026US 12,698,595 B2Nutrition & Biosciences USA 1, LLC
- Starch fixation and retention in recycled fiber systems28 Jul 2026US 12,692,654 B2Kemira Oyj
- Water resistant and repulpable compositions28 Jul 2026US 12,692,662 B2Neenah, Inc.
- Process for producing hygienized pulp8 Oct 2026US 2026/0308846 A1Kemira Oyj
- Paperboard comprising recycled fibres24 Sep 2026US 2026/0286608 A1Billerud Aktiebolag (publ)
- Barrier recycled paperboard and method for manufacturing thereof10 Sep 2026US 2026/0266001 A1WestRock MWV, LLC
- Process for producing rigid cellulosic product20 Aug 2026US 2026/0243023 A1Honext Material, Sl
- Process for producing rigid cellulosic product30 Jul 2026US 2026/0217867 A1Honext Material, Sl
Most cited
By later US patents
- Soft single-ply tissue having very low sideness146US 6,051,104 AFort James Corporation · 2000
- Soft-single ply tissue having very low sidedness139US 5,695,607 AJames River Corporation of Virginia · 1997
- Production of paper and paper board121US 4,913,775 AAllied Colloids Limited · 1990
- System and method for producing bonded fiber/cellulose products111US 8,795,470 B22014
- Fabric crepe/draw process for producing absorbent sheet106US 7,789,995 B2Georgia-Pacific Consumer Products LP · 2010