D21H 23/10
At least two kinds of compounds being added
Official title: at least two kinds of compounds being added
D21H23/10 (At least two kinds of compounds being added) appears on 49 US grants and 28 published applications in this corpus.
Search patents in D21H- Granted patents
- 49
- Published applications
- 28
- Assignees
- 37
- Inventors
- 116
- Latest grant
- 17 Jun 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 0 | 0 |
| 1998 | 1 | 0 |
| 1999 | 2 | 0 |
| 2000 | 1 | 0 |
| 2001 | 1 | 0 |
| 2002 | 1 | 3 |
| 2003 | 3 | 1 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 2 | 4 |
| 2008 | 1 | 1 |
| 2009 | 2 | 3 |
| 2010 | 2 | 0 |
| 2011 | 2 | 0 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 2 | 2 |
| 2017 | 1 | 2 |
| 2018 | 0 | 1 |
| 2019 | 3 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 0 |
| 2023 | 0 | 2 |
| 2024 | 1 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Glyoxylated starch additive for pulp products17 Jun 2025US 12,331,467 B2The Board of Trustees of Western Michigan University
- High cationic starch as a promoter in AKD sizing emulsions9 Jul 2024US 12,031,274 B2Kemira Oyj
- Dry strength composition, its use and method for making of paper, board or the like22 Sep 2020US 10,781,556 B2Kemira Oyj
- Method for producing paper29 Oct 2019US 10,458,068 B2Kemira Oyj
- Method for producing paper8 Oct 2019US 10,435,843 B2Kemira Oyj
- A method for reducing the load of microbial contaminants in a pulp stock comprising a recycled fiber fraction16 Apr 2026US 2026/0103843 A1Stora Enso OYJ
- Glycoxylated Starch Additive for Pulp Products13 Nov 2025US 2025/0347056 A1The Board of Trustees of Western Michigan University
- Multi-Region Pulp Article6 Jun 2024US 2024/0183109 A1The Procter & Gamble Company
- Method for separating cellulosic particulates out of fiber suspensions and/or filtrates25 Jan 2024US 2024/0026606 A1Papierholz Austria GmbH
- Glyoxylated starch additive for pulp products28 Sep 2023US 2023/0304226 A1The Board of Trustees of Western Michigan University
Most cited
By later US patents
- Method for improved wet strength paper90US 5,935,383 AKimberly-Clark Worldwide, Inc. · 1999
- Process for producing sized paper and cardboard with polyelectrolytes and epoxide-amine-polyamide reaction products49US 4,299,654 ACiba-Geigy Corporation · 1981
- High yield fiber sheets48US 4,247,362 AThe Buckeye Cellulose Corporation · 1981
- Method of improving filler retention in papermaking40US 5,779,859 AJ. M. Huber Corporation · 1998
- Latex containing papers38US 4,510,019 APapeteries de Jeand'heurs · 1985