D21H 17/42
Anionic
Official title: anionic
D21H17/42 (Anionic) appears on 317 US grants and 182 published applications in this corpus.
Search patents in D21H- Granted patents
- 317
- Published applications
- 182
- Assignees
- 163
- Inventors
- 683
- Latest grant
- 5 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 6 | 0 |
| 1978 | 12 | 0 |
| 1979 | 7 | 0 |
| 1980 | 11 | 0 |
| 1981 | 6 | 0 |
| 1982 | 5 | 0 |
| 1983 | 8 | 0 |
| 1984 | 6 | 0 |
| 1985 | 6 | 0 |
| 1986 | 11 | 0 |
| 1987 | 3 | 0 |
| 1988 | 7 | 0 |
| 1989 | 7 | 0 |
| 1990 | 7 | 0 |
| 1991 | 10 | 0 |
| 1992 | 7 | 0 |
| 1993 | 7 | 0 |
| 1994 | 3 | 0 |
| 1995 | 0 | 0 |
| 1996 | 9 | 0 |
| 1997 | 4 | 0 |
| 1998 | 9 | 0 |
| 1999 | 10 | 0 |
| 2000 | 12 | 0 |
| 2001 | 12 | 1 |
| 2002 | 11 | 13 |
| 2003 | 4 | 10 |
| 2004 | 9 | 7 |
| 2005 | 3 | 4 |
| 2006 | 4 | 14 |
| 2007 | 3 | 5 |
| 2008 | 0 | 7 |
| 2009 | 3 | 4 |
| 2010 | 6 | 12 |
| 2011 | 9 | 6 |
| 2012 | 4 | 7 |
| 2013 | 8 | 7 |
| 2014 | 6 | 5 |
| 2015 | 6 | 7 |
| 2016 | 3 | 3 |
| 2017 | 3 | 5 |
| 2018 | 5 | 5 |
| 2019 | 3 | 12 |
| 2020 | 9 | 6 |
| 2021 | 4 | 12 |
| 2022 | 10 | 3 |
| 2023 | 3 | 8 |
| 2024 | 5 | 6 |
| 2025 | 5 | 5 |
| 2026 | 3 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Additive compositions for papermaking5 May 2026US 12,618,197 B2Solenis Technologies, L.P.
- Treatment system for manufacture of paper, board or the like21 Apr 2026US 12,606,959 B2Kemira Oyj
- Wet laid paper and paperboard products with high wet strength and method of making the same27 Jan 2026US 12,534,854 B2First Quality Tissue, LLC
- Synthetic method for the preparation of rheological modifying polymers and the use thereof21 Oct 2025US 12,448,477 B2Polyanalytik Inc.
- Polymer and method for the preparation thereof22 Jul 2025US 12,365,754 B2Snf Group
- Paper substrate for fibrous casing substrate8 Oct 2026US 2026/0308848 A1Nippon Paper Papylia Co., Ltd.
- Treatment system and method for manufacture of paper, board or the like27 Aug 2026US 2026/0250909 A1Kemira Oyj
- Woven fabric30 Jul 2026US 2026/0218420 A1Spinnova Oyj
- Nonwoven fabrics, products comprising the same and methods for manufacturing nonwoven fabrics23 Jul 2026US 2026/0210049 A1Spinnova Oyj
- Strength composition and method for dissolving the strength composition23 Jul 2026US 2026/0210056 A1Kemira Oyj
Most cited
By later US patents
- Water absorbing agent285US 4,734,478 ANippon Shokubai Kagaku Kogyo Co., Ltd. · 1988
- Water-disintegrable cleaning sheet156US 5,281,306 AKao Corporation · 1994
- Cellulose-Based medical packaging material sterilizable by oxidizing gas plasma127US 6,156,677 AKimberly-Clark Worldwide, Inc. · 2000
- Highly filled sheets and method of preparation thereof125US 4,225,383 AThe Dow Chemical Company · 1980
- Loaded paper116US 4,925,530 AThe Wiggins Teape Group Limited · 1990