D21H 21/18
Reinforcing agents
D21H21/18 (Reinforcing agents) appears on 1,095 US grants and 1,205 published applications in this corpus.
Search patents in D21H- Granted patents
- 1,095
- Published applications
- 1,205
- Assignees
- 389
- Inventors
- 2,113
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 3 | 0 |
| 1978 | 7 | 0 |
| 1979 | 2 | 0 |
| 1980 | 4 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 2 | 0 |
| 1984 | 2 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 0 | 0 |
| 1988 | 7 | 0 |
| 1989 | 9 | 0 |
| 1990 | 13 | 0 |
| 1991 | 6 | 0 |
| 1992 | 9 | 0 |
| 1993 | 6 | 0 |
| 1994 | 12 | 0 |
| 1995 | 9 | 0 |
| 1996 | 12 | 0 |
| 1997 | 20 | 0 |
| 1998 | 26 | 0 |
| 1999 | 18 | 0 |
| 2000 | 30 | 0 |
| 2001 | 40 | 9 |
| 2002 | 28 | 30 |
| 2003 | 21 | 27 |
| 2004 | 15 | 35 |
| 2005 | 13 | 33 |
| 2006 | 15 | 37 |
| 2007 | 18 | 34 |
| 2008 | 10 | 47 |
| 2009 | 16 | 40 |
| 2010 | 36 | 49 |
| 2011 | 38 | 35 |
| 2012 | 42 | 48 |
| 2013 | 40 | 37 |
| 2014 | 35 | 33 |
| 2015 | 26 | 67 |
| 2016 | 60 | 61 |
| 2017 | 57 | 60 |
| 2018 | 31 | 61 |
| 2019 | 34 | 61 |
| 2020 | 66 | 59 |
| 2021 | 44 | 70 |
| 2022 | 46 | 66 |
| 2023 | 45 | 68 |
| 2024 | 47 | 54 |
| 2025 | 36 | 48 |
| 2026 | 32 | 36 |
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.
- Method, apparatus, and system of a fibrillated nanocellulose material4 Aug 2026US 12,698,596 B2Ecoinno (H.K.) Limited
- Water resistant and repulpable compositions28 Jul 2026US 12,692,662 B2Neenah, Inc.
- Method for producing wet-running friction paper28 Jul 2026US 12,692,663 B2Schaeffler Technologies AG & Co. KG
- Paper substrate for fibrous casing substrate8 Oct 2026US 2026/0308848 A1Nippon Paper Papylia Co., Ltd.
- Method for making a multi-layered board10 Sep 2026US 2026/0265999 A1Kemira Oyj
- Treatment system and method for manufacture of paper, board or the like27 Aug 2026US 2026/0250909 A1Kemira Oyj
- Carbon fiber sheet, gas diffusion electrode medium, fuel cell, and method for manufacturing carbon fiber sheet27 Aug 2026US 2026/0253914 A1Toray Industries, Inc.
- Pae-free papermaking machine and methods of making paper products using the same20 Aug 2026US 2026/0243029 A1First Quality Tissue, LLC
Most cited
By later US patents
- Dual-zoned absorbent webs287US 5,990,377 AKimberly-Clark Worldwide, Inc. · 1999
- Fabric creped absorbent sheet with variable local basis weight270US 7,494,563 B2Georgia-Pacific Consumer Products LP · 2009
- Dual-zoned absorbent webs269US 6,395,957 B1Kimberly-Clark Worldwide, Inc. · 2002
- Fabric crepe process for making absorbent sheet217US 7,399,378 B2Georgia-Pacific Consumer Products LP · 2008
- Multifunctional tissue paper product199US 6,162,327 AThe Procter & Gamble Company · 2000