D21H 17/65
Acid compounds
D21H17/65 (Acid compounds) appears on 58 US grants and 58 published applications in this corpus.
Search patents in D21H- Granted patents
- 58
- Published applications
- 58
- Assignees
- 45
- Inventors
- 142
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 1 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 2 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 0 |
| 2002 | 3 | 4 |
| 2003 | 3 | 3 |
| 2004 | 2 | 2 |
| 2005 | 0 | 0 |
| 2006 | 3 | 1 |
| 2007 | 0 | 0 |
| 2008 | 0 | 1 |
| 2009 | 0 | 0 |
| 2010 | 0 | 4 |
| 2011 | 1 | 3 |
| 2012 | 3 | 1 |
| 2013 | 0 | 1 |
| 2014 | 5 | 1 |
| 2015 | 0 | 4 |
| 2016 | 2 | 2 |
| 2017 | 1 | 5 |
| 2018 | 2 | 4 |
| 2019 | 3 | 4 |
| 2020 | 3 | 4 |
| 2021 | 4 | 2 |
| 2022 | 1 | 3 |
| 2023 | 1 | 3 |
| 2024 | 4 | 3 |
| 2025 | 1 | 1 |
| 2026 | 2 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Moisture/oil resistant composite materials29 Sep 2026US 12,747,536 B2World Centric
- Method for reducing amount of bacterial endospores in an aqueous fibre suspension28 Apr 2026US 12,612,736 B2Kemira Oyj
- Process for producing coloured cardboard in a cardboard production apparatus, and coloured produced by such a process24 Jun 2025US 12,338,580 B2The Eska Company
- Moisture/oil resistant composite materials3 Dec 2024US 12,157,976 B2World Centric
- Compostable cellulose-based paper for gas barrier in packaging material19 Nov 2024US 12,146,267 B2Ahlstrom Oyj
- Recyclable cellulose-based substrate comprising cellulosic fibres and nonfibrous cellulosic material30 Jul 2026US 2026/0217869 A1
- Wet strength improved fibrous non-woven fabrics, in particular paper, uses of these wet strength fabrics as well as production methods of the same8 Jan 2026US 2026/0009172 A1Technische Universität Darmstadt
- Moisture/oil resistant composite materials13 Feb 2025US 2025/0052006 A1World Centric
- Compostable cellulose-based paper for gas barrier in packaging material19 Dec 2024US 2024/0417931 A1Ahlstrom Oyj
- Moisture/oil resistant composite materials15 Feb 2024US 2024/0052571 A1World Centric
Most cited
By later US patents
- Use of calcium carbonate in an acidic aqueous media49US 6,228,161 B1Minerals Technologies Inc. · 2001
- Process for obtaining fibers integral with calcium carbonate particles47US 6,387,212 B1L 'Air Liquide-Societe 'Anonyme a 'Directoire et Conseil de Surveillance pour l 'Etude et L'Exploitation des Procedes Georges Claude · 2002
- Chemically treated paper products--towel and tissue38US 4,786,367 AScott Paper Company · 1988
- Procedure for adding a filler into a pulp based on cellulose fibers36US 6,436,232 B1M-real Oyj · 2002
- Cellulose and cellulose products modified by silicic acid35US 4,033,913 A1977