D21H 5/26
Special paper or cardboard manufactured by dry method
Official title: {Special paper or cardboard manufactured by dry method; Apparatus or processes for forming webs by dry method from mainly short-fibre or particle material, e.g. paper pulp (making board from wood, e.g. lignocellulosic, particles or fibres B27N1/00 and subgroups; making non-woven fabrics from textile fibres D04H1/72; machines for forming diapers A61F13/15585; lap-forming devices in preliminary treatment of fibres, e.g. for spinning D01G25/00)}
D21H5/26 (Special paper or cardboard manufactured by dry method) appears on 96 US grants and 15 published applications in this corpus.
Search patents in D21H- Granted patents
- 96
- Published applications
- 15
- Assignees
- 41
- Inventors
- 138
- Latest grant
- 21 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 12 | 0 |
| 1977 | 7 | 0 |
| 1978 | 11 | 0 |
| 1979 | 3 | 0 |
| 1980 | 5 | 0 |
| 1981 | 7 | 0 |
| 1982 | 10 | 0 |
| 1983 | 7 | 0 |
| 1984 | 5 | 0 |
| 1985 | 3 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 0 | 0 |
| 1989 | 3 | 0 |
| 1990 | 3 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 4 |
| 2014 | 0 | 0 |
| 2015 | 1 | 0 |
| 2016 | 0 | 2 |
| 2017 | 1 | 1 |
| 2018 | 1 | 1 |
| 2019 | 1 | 1 |
| 2020 | 1 | 4 |
| 2021 | 1 | 0 |
| 2022 | 2 | 0 |
| 2023 | 0 | 1 |
| 2024 | 0 | 1 |
| 2025 | 1 | 0 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Sheet manufacturing apparatus21 Jul 2026US 12,686,969 B2Seiko Epson Corporation
- Method for the manufacturing a 3-dimensional shaped product from a fluff pulp material and such product30 Dec 2025US 12,509,827 B2Huhtamaki Molded Fiber Technology B,V,
- Cellulose and cellulose ester film13 Dec 2022US 11,525,215 B2Eastman Chemical Company
- Sheet forming binder, container, sheet forming apparatus, sheet forming method, and powder set11 Oct 2022US 11,465,387 B2Seiko Epson Corporation
- Sheet manufacturing apparatus9 Feb 2021US 10,914,034 B2Seiko Epson Corporation
- Sheet manufacturing apparatus23 May 2024US 2024/0167223 A1Seiko Epson Corporation
- Food packaging6 Jul 2023US 2023/0211933 A1BioPaxium Technologies Limited
- Method for the manufacturing a 3-diminesional shaped product from a fluff pulp material and such product30 Apr 2020US 2020/0131710 A1Huhtamaki Molded Fiber Technology B,V,
- Output Conveyor Belt of a Crosslapper5 Mar 2020US 2020/0071083 A1Oskar Dilo Maschinenfabrik KG
- Cellulose and cellulose ester film27 Feb 2020US 2020/0063353 A1Eastman Chemical Company
Most cited
By later US patents
- Adsorptive nonwoven fabric comprising fused fibers, non-fused fibers and absorptive material and method of making same154US 4,160,059 AHonshu Seishi Kabushiki Kaisha · 1979
- Absorbent panel having densified portion with hydrocolloid material fixed therein106US 4,103,062 AJohnson & Johnson · 1978
- Liquid absorbent fibrous material and method of making the same77US 4,082,886 AJohnson & Johnson · 1978
- Nonwoven fabric75US 4,018,646 AJohnson & Johnson · 1977
- Method for the manufacture of cellulosic fibrous material which can be pressed into moulded parts74US 4,290,988 ACasimir Kast GmbH & Co. KG · 1981