D21H 21/00
Non-fibrous material added to the pulp, characterised by its function, form or
Official title: Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
D21H21/00 (Non-fibrous material added to the pulp, characterised by its function, form or) appears on 5,224 US grants and 5,287 published applications in this corpus.
Search patents in D21H- Granted patents
- 5,224
- Published applications
- 5,287
- Assignees
- 1,780
- Inventors
- 10,226
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 27 | 0 |
| 1977 | 27 | 0 |
| 1978 | 38 | 0 |
| 1979 | 17 | 0 |
| 1980 | 34 | 0 |
| 1981 | 34 | 0 |
| 1982 | 37 | 0 |
| 1983 | 49 | 0 |
| 1984 | 48 | 0 |
| 1985 | 31 | 0 |
| 1986 | 24 | 0 |
| 1987 | 39 | 0 |
| 1988 | 44 | 0 |
| 1989 | 52 | 0 |
| 1990 | 64 | 0 |
| 1991 | 58 | 0 |
| 1992 | 69 | 0 |
| 1993 | 85 | 0 |
| 1994 | 68 | 0 |
| 1995 | 81 | 0 |
| 1996 | 117 | 0 |
| 1997 | 132 | 0 |
| 1998 | 110 | 0 |
| 1999 | 146 | 0 |
| 2000 | 157 | 0 |
| 2001 | 178 | 41 |
| 2002 | 154 | 139 |
| 2003 | 126 | 177 |
| 2004 | 114 | 199 |
| 2005 | 74 | 209 |
| 2006 | 63 | 214 |
| 2007 | 103 | 205 |
| 2008 | 75 | 235 |
| 2009 | 84 | 193 |
| 2010 | 135 | 257 |
| 2011 | 155 | 190 |
| 2012 | 171 | 188 |
| 2013 | 172 | 220 |
| 2014 | 196 | 197 |
| 2015 | 132 | 264 |
| 2016 | 173 | 257 |
| 2017 | 185 | 212 |
| 2018 | 147 | 212 |
| 2019 | 168 | 227 |
| 2020 | 202 | 220 |
| 2021 | 168 | 211 |
| 2022 | 159 | 218 |
| 2023 | 132 | 230 |
| 2024 | 143 | 227 |
| 2025 | 123 | 190 |
| 2026 | 104 | 155 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Low cellulosic non-wood fiber products and methods of making the same6 Oct 2026US 12,753,553 B2Archer Daniels Midland Company
- Method of preparing aldehyde-functionalized polymers29 Sep 2026US 12,747,307 B2Ecolab USA Inc.
- Cellulosic fiber material and process29 Sep 2026US 12,747,537 B2PaperShell AB
- 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
- Method for preparing multifunctional environmental friendly coating for waterproof and oil-proof food packaging papers by one step method and application thereof15 Sep 2026US 12,735,842 B2Zhejiang University of Science and Technology
- Paper substrate for fibrous casing substrate8 Oct 2026US 2026/0308848 A1Nippon Paper Papylia Co., Ltd.
- Oil Resistant Sheet Product8 Oct 2026US 2026/0308851 A1SWM Holdco Luxembourg
- Soft treated tissue product8 Oct 2026US 2026/0308852 A1Kimberly-Clark Worldwide, Inc.
- 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
Most cited
By later US patents
- Diaper having a lotioned topsheet815US 5,643,588 AThe Procter & Gamble Company · 1997
- Absorbent article having a lotioned topsheet509US 5,968,025 AThe Procter & Gamble Company · 1999
- Antimicrobial compositions comprising a benzoic acid analog and a metal salt342US 6,294,186 B12001
- Cationic imidazole azo dyes292US 5,708,151 ACiba Specialty Chemicals Corporation · 1998
- Dual-zoned absorbent webs287US 5,990,377 AKimberly-Clark Worldwide, Inc. · 1999