D21F 11/08
Paper or board consisting of two or more layers
Official title: paper or board consisting of two or more layers
D21F11/08 (Paper or board consisting of two or more layers) appears on 37 US grants and 31 published applications in this corpus.
Search patents in D21F- Granted patents
- 37
- Published applications
- 31
- Assignees
- 25
- Inventors
- 79
- Latest grant
- 23 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 1 | 0 |
| 2000 | 0 | 0 |
| 2001 | 1 | 1 |
| 2002 | 1 | 0 |
| 2003 | 1 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 0 | 0 |
| 2011 | 0 | 1 |
| 2012 | 0 | 1 |
| 2013 | 2 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 1 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 2 |
| 2019 | 2 | 5 |
| 2020 | 1 | 1 |
| 2021 | 6 | 4 |
| 2022 | 1 | 1 |
| 2023 | 6 | 5 |
| 2024 | 0 | 2 |
| 2025 | 2 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for producing a green paper for producing a gas diffusion layer for a fuel cell23 Jun 2026US 12,665,202 B2Giesecke+Devrient Currency Technology GmbH
- Multilayer film comprising MFC22 Jul 2025US 12,366,035 B2Stora Enso OYJ
- Rotary filter apparatus for roll-to-roll nanomaterial dispersion papermaking1 Jul 2025US 12,343,683 B2Bulk Nano Processing LLC
- Thick-caliper laminated paperboard and methods for making the same3 Oct 2023US 11,773,540 B1Caraustar Industrial and Consumer Products Group, Inc.
- Multi-ply fibrous structure-containing articles26 Sep 2023US 11,767,642 B2The Procter & Gamble Company
- Rotary Filter Apparatus For Roll-To-Roll Nanomaterial Dispersion Papermaking21 Mar 2024US 2024/0091713 A1Bulk Nano Processing LLC
- Multi-ply fibrous structure-containing articles22 Feb 2024US 2024/0060243 A1The Procter & Gamble Company
- Method for producing a green paper for producing a gas diffusion layer for a fuel cell21 Dec 2023US 2023/0411632 A1Giesecke+Devrient Currency Technology GmbH
- Multilayer film comprising mfc5 Oct 2023US 2023/0313463 A1Stora Enso OYJ
- Green paper for producing a gas diffusion layer for a fuel cell5 Oct 2023US 2023/0317973 A1Giesecke+Devrient Currency Technology GmbH
Most cited
By later US patents
- Method and apparatus for making absorbent structures with absorbent material155US 8,568,566 B2The Procter & Gamble Company · 2013
- Fiber reinforced plastic articles and method of preparation54US 3,954,555 ANational Gypsum Company · 1976
- Multi-layered water-decomposable fibrous sheet37US 6,258,210 B1Uni-Charm Corporation · 2001
- Security paper comprising localized areas with reduced thickness and opacity, and method for making same19US 6,402,888 B1Arjo Wiggins S.A. · 2002
- Forgery preventive sheet and method of manufacturing same12US 5,961,432 ATokushu Paper Mfg. Co., Ltd. · 1999