D21H 23/08
By measuring pulp properties
Official title: by measuring pulp properties, e.g. zeta potential, pH
D21H23/08 (By measuring pulp properties) appears on 81 US grants and 53 published applications in this corpus.
Search patents in D21H- Granted patents
- 81
- Published applications
- 53
- Assignees
- 57
- Inventors
- 208
- Latest grant
- 28 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 4 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 1 | 0 |
| 1986 | 1 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 2 | 0 |
| 1990 | 5 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 1 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 3 |
| 2003 | 4 | 2 |
| 2004 | 1 | 4 |
| 2005 | 0 | 1 |
| 2006 | 3 | 2 |
| 2007 | 2 | 6 |
| 2008 | 1 | 1 |
| 2009 | 2 | 4 |
| 2010 | 2 | 2 |
| 2011 | 5 | 1 |
| 2012 | 0 | 2 |
| 2013 | 2 | 2 |
| 2014 | 0 | 0 |
| 2015 | 0 | 0 |
| 2016 | 3 | 3 |
| 2017 | 1 | 3 |
| 2018 | 2 | 3 |
| 2019 | 3 | 1 |
| 2020 | 1 | 0 |
| 2021 | 0 | 0 |
| 2022 | 0 | 1 |
| 2023 | 0 | 2 |
| 2024 | 1 | 5 |
| 2025 | 2 | 4 |
| 2026 | 2 | 1 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method for producing wet-running friction paper28 Jul 2026US 12,692,663 B2Schaeffler Technologies AG & Co. KG
- Softener concentrate, softener emulsion, method for producing softener emulsion and its use14 Jul 2026US 12,680,231 B2Kemira Oyj
- Glyoxylated starch additive for pulp products17 Jun 2025US 12,331,467 B2The Board of Trustees of Western Michigan University
- Method for suppressing sedimentation of suspended substance, method for suppressing pitch trouble, and method for detecting sedimentation of suspended substance11 Mar 2025US 12,247,354 B2Kurita Water Industries Ltd.
- High cationic starch as a promoter in AKD sizing emulsions9 Jul 2024US 12,031,274 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
- System and method of real-time enzymatic activity detection and dynamic formulation for pulp and paper production24 Jul 2025US 2025/0237014 A1
- Methods and compositions for papermaking8 May 2025US 2025/0146224 A1Solenis Technologies, L.P.
- A method for improving grease and oil resistance of a fiber based article30 Jan 2025US 2025/0034813 A1Kemira Oyj
Most cited
By later US patents
- Soft tissue having temporary wet strength148US 6,149,769 AThe Procter & Gamble Company · 2000
- Method for improved wet strength paper90US 5,935,383 AKimberly-Clark Worldwide, Inc. · 1999
- Methods for dispersing fibers within aqueous compositions63US 6,379,446 B1E. Khashoggi Industries · 2002
- 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