D21H 5/12
Special paper or cardboard not otherwise provided for: characterised by the use
Official title: {characterised by the use of special fibrous materials (felts or other non-woven fabrics D04)}
D21H5/12 (Special paper or cardboard not otherwise provided for: characterised by the use) appears on 240 US grants and 55 published applications in this corpus.
Search patents in D21H- Granted patents
- 240
- Published applications
- 55
- Assignees
- 145
- Inventors
- 442
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 22 | 0 |
| 1977 | 15 | 0 |
| 1978 | 13 | 0 |
| 1979 | 14 | 0 |
| 1980 | 16 | 0 |
| 1981 | 22 | 0 |
| 1982 | 12 | 0 |
| 1983 | 19 | 0 |
| 1984 | 15 | 0 |
| 1985 | 11 | 0 |
| 1986 | 13 | 0 |
| 1987 | 10 | 0 |
| 1988 | 11 | 0 |
| 1989 | 7 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 2 | 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 | 1 |
| 2012 | 1 | 2 |
| 2013 | 0 | 0 |
| 2014 | 1 | 3 |
| 2015 | 1 | 1 |
| 2016 | 1 | 5 |
| 2017 | 1 | 2 |
| 2018 | 3 | 4 |
| 2019 | 4 | 4 |
| 2020 | 1 | 5 |
| 2021 | 3 | 3 |
| 2022 | 4 | 12 |
| 2023 | 3 | 2 |
| 2024 | 8 | 4 |
| 2025 | 2 | 6 |
| 2026 | 1 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- D21H 5/20Of organic non-cellulosic fibres too short for spinning, with or without cellulose68
- D21H 5/14Of cellulose fibres only41
- D21H 5/18Of inorganic fibres with or without cellulose fibres32
- D21H 5/1254Of fibres which have been treated to improve their dispersion in the23
- D21H 5/1272Of fibres which can be physically or chemically modified during or after19
- D21H 5/1236Of fibres which have been treated to render them suitable for sheet10
- D21H 5/1227Of polysaccharide fibres other than cellulosic9
- D21H 5/1218Of crimped or crimpable fibres4
Recent patents
- Sanitary tissue product rolls29 Sep 2026US 12,747,535 B2The Procter & Gamble Company
- Sustainably-sourced, high strength non woven8 Jul 2025US 12,351,987 B2Fybervek Holdings LLC
- Supercalendered kraft paper comprising recycled fiber7 Jan 2025US 12,188,183 B2Upm-Kymmene Corporation
- Repulpable and recyclable composite packaging articles and related methods10 Dec 2024US 12,162,990 B2Smart Planet Technologies, Inc.
- Sanitary tissue product rolls26 Nov 2024US 12,152,347 B2The Procter & Gamble Company
- Method for preparing janus paper by mycelia and janus paper11 Jun 2026US 2026/0160021 A1Jilin Agricultural University
- Method for producing cellulose-fiber-containing material, method for producing reaction cellulose fibers, and method for producing reaction microfibers4 Dec 2025US 2025/0369189 A1Daio Paper Corporation
- Sustainably-Sourced, High Strength Non Woven25 Sep 2025US 2025/0297427 A1Fybervek Holdings LLC
- Tipping paper to which technology for reducing tobacco smell on fingers is applied and smoking article including the same, and method of producing the tipping paper7 Aug 2025US 2025/0250741 A1Kt&G Corporation
- Supercalendered kraft paper comprising recycled fiber20 Mar 2025US 2025/0092604 A1
Most cited
By later US patents
- Asbestiform crystalline calcium sodium or lithium phosphate, preparation and compositions161US 4,346,028 AMonsanto Company · 1982
- Wrapper for smoking articles and method122US 4,450,847 AOlin Corporation · 1984
- Process for the production of paper containing starch fibers and the paper produced thereby107US 4,243,480 ANational Starch and Chemical Corporation · 1981
- Intumescent sheet material103US 4,305,992 AMinnesota Mining and Manufacturing Company · 1981
- Fibrillated fibers and articles made therefrom100US 5,180,630 AAmerican Cyanamid Company · 1993