D21J
Fibreboard
Official title: FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE (manufacture of articles by dry processes B27N)
D21J (Fibreboard) appears on 653 US grants and 860 published applications in this corpus.
Search patents in D21J- Granted patents
- 653
- Published applications
- 860
- Assignees
- 455
- Inventors
- 1,634
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 14 | 0 |
| 1978 | 14 | 0 |
| 1979 | 14 | 0 |
| 1980 | 2 | 0 |
| 1981 | 5 | 0 |
| 1982 | 3 | 0 |
| 1983 | 8 | 0 |
| 1984 | 5 | 0 |
| 1985 | 6 | 0 |
| 1986 | 5 | 0 |
| 1987 | 2 | 0 |
| 1988 | 5 | 0 |
| 1989 | 2 | 0 |
| 1990 | 3 | 0 |
| 1991 | 7 | 0 |
| 1992 | 7 | 0 |
| 1993 | 6 | 0 |
| 1994 | 7 | 0 |
| 1995 | 5 | 0 |
| 1996 | 3 | 0 |
| 1997 | 9 | 0 |
| 1998 | 12 | 0 |
| 1999 | 6 | 0 |
| 2000 | 15 | 0 |
| 2001 | 12 | 2 |
| 2002 | 18 | 8 |
| 2003 | 15 | 20 |
| 2004 | 8 | 20 |
| 2005 | 8 | 15 |
| 2006 | 10 | 5 |
| 2007 | 7 | 4 |
| 2008 | 8 | 9 |
| 2009 | 4 | 22 |
| 2010 | 4 | 13 |
| 2011 | 9 | 14 |
| 2012 | 9 | 18 |
| 2013 | 12 | 34 |
| 2014 | 14 | 19 |
| 2015 | 11 | 21 |
| 2016 | 9 | 25 |
| 2017 | 17 | 21 |
| 2018 | 29 | 51 |
| 2019 | 15 | 28 |
| 2020 | 28 | 45 |
| 2021 | 21 | 39 |
| 2022 | 25 | 77 |
| 2023 | 35 | 66 |
| 2024 | 45 | 109 |
| 2025 | 67 | 92 |
| 2026 | 34 | 83 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Main groups
Granted patents with any code in the group
- D21J 1/00Fibreboard297
- D21J 3/00Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds297
- D21J 7/00Manufacture of hollow articles from fibre suspensions or papier-mâché by deposition of209
- D21J 5/00Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or74
Recent patents
- Polylactide formulation for improved extrusion processing6 Oct 2026US 12,753,555 B2WestRock MWV, LLC
- Moisture/oil resistant composite materials29 Sep 2026US 12,747,536 B2World Centric
- Thermoformable ovenable recyclable coated cellulosic board, ovenable recyclable coated cellulosic board food vessels thermoformed therefrom, and methods for manufacturing and using thereof29 Sep 2026US 12,747,540 B2WestRock MWV, LLC
- Process and system for manufacturing a fibreboard from waste materials22 Sep 2026US 12,742,293 B2
- Automatic forming machine for pulp molding product and manufacturing method therefor1 Sep 2026US 12,723,355 B2Foshan City Meiwanbang Technology Co. Ltd.
- Method for coating a hollow container comprising molded pulp8 Oct 2026US 2026/0308853 A1
- A process for molding cellulosic material into a tridimensional package, and a package thus obtained8 Oct 2026US 2026/0308854 A1Societe des Produits Nestle S. A.
- A method for producing a fiber based article1 Oct 2026US 2026/0297852 A1Kemira Oyj
- Coating apparatus for coating a hollow container comprising molded pulp1 Oct 2026US 2026/0297855 A1
- Biodegradable three-dimensional products molded from natural fibers24 Sep 2026US 2026/0286617 A1Papacks Sales GmbH
Most cited
By later US patents
- Process for the manufacture of shaped fibrous products and the resultant product214US 4,613,627 AUSG Acoustical Products Company · 1986
- Biocomposite material and method of making155US 5,593,625 APhenix Biocomposites, Inc. · 1997
- Floor element136US 5,827,592 A1998
- Formable pulp compositions123US 4,562,218 AArmstrong World Industries, Inc. · 1985
- System and method for producing bonded fiber/cellulose products111US 8,795,470 B22014