D21H 23/14
By selecting point of addition or time of contact between components
Official title: by selecting point of addition or time of contact between components
D21H23/14 (By selecting point of addition or time of contact between components) appears on 140 US grants and 68 published applications in this corpus.
Search patents in D21H- Granted patents
- 140
- Published applications
- 68
- Assignees
- 77
- Inventors
- 265
- Latest grant
- 4 Feb 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 2 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 7 | 0 |
| 1993 | 12 | 0 |
| 1994 | 3 | 0 |
| 1995 | 2 | 0 |
| 1996 | 8 | 0 |
| 1997 | 9 | 0 |
| 1998 | 6 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 4 | 0 |
| 2002 | 7 | 5 |
| 2003 | 3 | 3 |
| 2004 | 4 | 3 |
| 2005 | 0 | 3 |
| 2006 | 0 | 2 |
| 2007 | 2 | 5 |
| 2008 | 0 | 4 |
| 2009 | 1 | 3 |
| 2010 | 0 | 5 |
| 2011 | 3 | 0 |
| 2012 | 3 | 3 |
| 2013 | 4 | 3 |
| 2014 | 4 | 2 |
| 2015 | 0 | 4 |
| 2016 | 1 | 2 |
| 2017 | 2 | 2 |
| 2018 | 3 | 3 |
| 2019 | 3 | 2 |
| 2020 | 4 | 4 |
| 2021 | 0 | 2 |
| 2022 | 3 | 1 |
| 2023 | 1 | 0 |
| 2024 | 1 | 5 |
| 2025 | 1 | 2 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Process for producing paper or board and a product thereof4 Feb 2025US 12,215,463 B2Kemira Oyj
- Method for manufacturing paper and cardboard5 Nov 2024US 12,134,860 B2Snf Group
- Dosing of nanocellulose suspension in gel phase14 Feb 2023US 11,578,463 B2Stora Enso OYJ
- Method for manufacture of paper or board and paper or board obtained by the method27 Dec 2022US 11,535,985 B2Kemira Oyj
- Method of and an arrangement for adding a chemical to an approach flow system of a fiber web machine7 Jun 2022US 11,352,749 B2Valmet Technologies Oy
- Strengthening agents and processes for making and using same6 Mar 2025US 2025/0075432 A1Ecolab USA Inc.
- Method and reactor for producing produce calcium carbonate27 Feb 2025US 2025/0066215 A1Wetend Technologies Oy
- Method for reducing starch content of an aqueous phase removed from fibre stock preparation3 Oct 2024US 2024/0328089 A1Kemira Oyj
- Process for obtaining bio-sourced diallyldialkylammonium halide22 Aug 2024US 2024/0279154 A1Snf Group
- Method for manufacturing paper and cardboard8 Aug 2024US 2024/0263398 A1Snf Group
Most cited
By later US patents
- Production of paper and paperboard198US 4,753,710 AAllied Colloids Limited · 1988
- Highly loaded fiber-based composite material146US 5,731,080 AInternational Paper Company · 1998
- Production of paper and paper board121US 4,913,775 AAllied Colloids Limited · 1990
- Loaded paper116US 4,925,530 AThe Wiggins Teape Group Limited · 1990
- Crosslinked cellulose products and method for their preparation114US 5,225,047 AWeyerhaeuser Company · 1993