D21H 21/14
Non-fibrous material added to the pulp, characterised by its function, form or
Official title: characterised by function or properties in or on the paper (D21H19/66, D21H27/02 take precedence)
D21H21/14 (Non-fibrous material added to the pulp, characterised by its function, form or) appears on 4,050 US grants and 4,261 published applications in this corpus.
Search patents in D21H- Granted patents
- 4,050
- Published applications
- 4,261
- Assignees
- 1,485
- Inventors
- 8,171
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 23 | 0 |
| 1977 | 21 | 0 |
| 1978 | 30 | 0 |
| 1979 | 14 | 0 |
| 1980 | 29 | 0 |
| 1981 | 24 | 0 |
| 1982 | 29 | 0 |
| 1983 | 40 | 0 |
| 1984 | 44 | 0 |
| 1985 | 26 | 0 |
| 1986 | 19 | 0 |
| 1987 | 34 | 0 |
| 1988 | 36 | 0 |
| 1989 | 40 | 0 |
| 1990 | 43 | 0 |
| 1991 | 40 | 0 |
| 1992 | 46 | 0 |
| 1993 | 45 | 0 |
| 1994 | 46 | 0 |
| 1995 | 59 | 0 |
| 1996 | 77 | 0 |
| 1997 | 91 | 0 |
| 1998 | 72 | 0 |
| 1999 | 99 | 0 |
| 2000 | 123 | 0 |
| 2001 | 144 | 27 |
| 2002 | 112 | 106 |
| 2003 | 94 | 122 |
| 2004 | 85 | 156 |
| 2005 | 56 | 157 |
| 2006 | 50 | 145 |
| 2007 | 80 | 161 |
| 2008 | 53 | 185 |
| 2009 | 61 | 157 |
| 2010 | 110 | 209 |
| 2011 | 121 | 151 |
| 2012 | 138 | 165 |
| 2013 | 138 | 173 |
| 2014 | 156 | 161 |
| 2015 | 104 | 206 |
| 2016 | 151 | 227 |
| 2017 | 153 | 167 |
| 2018 | 111 | 169 |
| 2019 | 136 | 175 |
| 2020 | 156 | 180 |
| 2021 | 137 | 183 |
| 2022 | 130 | 182 |
| 2023 | 111 | 193 |
| 2024 | 120 | 196 |
| 2025 | 105 | 172 |
| 2026 | 88 | 136 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- D21H 21/18Reinforcing agents1,095
- D21H 21/16Sizing or water-repelling agents909
- D21H 21/22Agents rendering paper porous, absorbent or bulky595
- D21H 21/40Agents facilitating proof of genuineness or preventing fraudulent alteration465
- D21H 21/28Colorants427
- D21H 21/36Biocidal agents251
- D21H 21/30Luminescent or fluorescent substances213
- D21H 21/146Crêping adhesives168
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.
- 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
- Silver compositions and methods for making biocidal currency15 Sep 2026US 12,735,843 B2
- 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