D21H 17/23
Lignins
D21H17/23 (Lignins) appears on 58 US grants and 54 published applications in this corpus.
Search patents in D21H- Granted patents
- 58
- Published applications
- 54
- Assignees
- 38
- Inventors
- 166
- Latest grant
- 28 Apr 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 4 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 2 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 3 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 4 | 0 |
| 2001 | 6 | 4 |
| 2002 | 1 | 3 |
| 2003 | 4 | 1 |
| 2004 | 0 | 0 |
| 2005 | 0 | 1 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 1 |
| 2010 | 0 | 2 |
| 2011 | 1 | 0 |
| 2012 | 1 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 0 | 3 |
| 2017 | 0 | 3 |
| 2018 | 2 | 1 |
| 2019 | 1 | 4 |
| 2020 | 4 | 1 |
| 2021 | 4 | 3 |
| 2022 | 1 | 3 |
| 2023 | 2 | 5 |
| 2024 | 1 | 6 |
| 2025 | 4 | 3 |
| 2026 | 3 | 7 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Aqueous emulsion and method for making it28 Apr 2026US 12,612,732 B2Kemira Oyj
- Pallet outer packaging paper3 Mar 2026US 12,565,738 B2Mondi AG
- Cellulose composition13 Jan 2026US 12,522,980 B2Kemira Oyj
- Surface size composition and its use7 Oct 2025US 12,435,472 B2Kemira Oyj
- Aqueous slurry for a coating colour composition for paper, board or the like19 Aug 2025US 12,392,088 B2Kemira Oyj
- Aqueous dispersion of alkyl ketene dimer and its use23 Jul 2026US 2026/0210055 A1Kemira Oyj
- Adhesive-free engineered plant materials, and methods for fabrication thereof16 Jul 2026US 2026/0200213 A1University of Maryland, College Park
- Production of hydrophobic paper9 Jul 2026US 2026/0193844 A1Sca Forest Products AB
- Filtration medium14 May 2026US 2026/0131269 A1
- Packaging biomaterial and method for manufacturing thereof23 Apr 2026US 2026/0109823 A1Kyiv Institute of Biotechnologies
Most cited
By later US patents
- Creping adhesive composition35US 5,025,046 AKimberly-Clark Corporation · 1991
- Strength of paper made from pulp containing surface active, carboxyl compounds31US 6,228,217 B1Hercules Incorporated · 2001
- Coacervate stabilizer system27US 6,315,824 B12001
- Additives for increased retention and pitch control in paper manufacture24US 4,313,790 APulp and Paper Research Institute of Canada · 1982
- Paper sizing composition24US 6,268,414 B1Hercules Incorporated · 2001