D21J 1/00
Fibreboard
Official title: Fibreboard (preparation of pulp compositions or addition of chemical agents D21B, D21C, D21H; formation of the wet web D21F)
D21J1/00 (Fibreboard) appears on 297 US grants and 359 published applications in this corpus.
Search patents in D21J- Granted patents
- 297
- Published applications
- 359
- Assignees
- 237
- Inventors
- 835
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 8 | 0 |
| 1980 | 2 | 0 |
| 1981 | 3 | 0 |
| 1982 | 0 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 1 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 3 | 0 |
| 1992 | 3 | 0 |
| 1993 | 2 | 0 |
| 1994 | 2 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 2 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 0 |
| 2002 | 7 | 5 |
| 2003 | 4 | 8 |
| 2004 | 1 | 5 |
| 2005 | 2 | 7 |
| 2006 | 3 | 1 |
| 2007 | 2 | 1 |
| 2008 | 2 | 4 |
| 2009 | 1 | 7 |
| 2010 | 1 | 7 |
| 2011 | 4 | 9 |
| 2012 | 7 | 9 |
| 2013 | 11 | 24 |
| 2014 | 9 | 12 |
| 2015 | 7 | 13 |
| 2016 | 5 | 7 |
| 2017 | 4 | 13 |
| 2018 | 16 | 35 |
| 2019 | 6 | 14 |
| 2020 | 19 | 20 |
| 2021 | 10 | 18 |
| 2022 | 13 | 33 |
| 2023 | 21 | 28 |
| 2024 | 16 | 41 |
| 2025 | 26 | 29 |
| 2026 | 17 | 9 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Polylactide formulation for improved extrusion processing6 Oct 2026US 12,753,555 B2WestRock MWV, LLC
- 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.
- Assymetric paperboard25 Aug 2026US 12,716,176 B2Billerud Aktiebolag (publ)
- Method for coating a hollow container comprising molded pulp8 Oct 2026US 2026/0308853 A1
- Coating apparatus for coating a hollow container comprising molded pulp1 Oct 2026US 2026/0297855 A1
- Method30 Jul 2026US 2026/0218459 A1
- Method for manufacturing a composite fibre board21 May 2026US 2026/0139439 A1Ecor Global Inc
- Packaging biomaterial and method for manufacturing thereof23 Apr 2026US 2026/0109823 A1Kyiv Institute of Biotechnologies
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
- 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
- Method of making a low density frothed mineral wool95US 5,013,405 AUSG Interiors, Inc. · 1991