D21H 3/00
Paper or cardboard prepared by adding substances to the pulp or to
Official title: {Paper or cardboard prepared by adding substances to the pulp or to the formed web on the paper-making machine and by applying substances to finished paper or cardboard (on the paper-making machine), also when the intention is to impregnate at least a part of the paper body}
D21H3/00 (Paper or cardboard prepared by adding substances to the pulp or to) appears on 16 US grants and 13 published applications in this corpus.
Search patents in D21H- Granted patents
- 16
- Published applications
- 13
- Assignees
- 15
- Inventors
- 32
- Latest grant
- 7 Jan 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1984 | 5 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 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 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 0 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 1 |
| 2016 | 1 | 1 |
| 2017 | 0 | 2 |
| 2018 | 1 | 0 |
| 2019 | 1 | 0 |
| 2020 | 0 | 2 |
| 2021 | 1 | 2 |
| 2022 | 2 | 2 |
| 2023 | 2 | 0 |
| 2024 | 1 | 1 |
| 2025 | 1 | 1 |
By publication year. Applications have been published since 2001.
Subgroups
Granted patents
Recent patents
- Supercalendered kraft paper comprising recycled fiber7 Jan 2025US 12,188,183 B2Upm-Kymmene Corporation
- Method for the hydrolysis of a polymer25 Jun 2024US 12,018,113 B2Solenis Technologies, L.P.
- Method for producing paper or cardboard24 Oct 2023US 11,795,255 B2Solenis Technologies, L.P.
- Papers comprising aerogel powder and aramid polymer fibrils14 Feb 2023US 11,578,461 B2Dupont Safety & Construction, Inc.
- Dry strength composition, its use and method for making of paper, board or the like30 Aug 2022US 11,427,965 B2Kemira Oyj
- Supercalendered kraft paper comprising recycled fiber20 Mar 2025US 2025/0092604 A1
- Supercalendered kraft paper comprising recycled fiber4 Jul 2024US 2024/0218598 A1Upm-Kymmene Corporation
- Method for the hydrolysis of a polymer3 Feb 2022US 2022/0033540 A1Solenis Technologies Cayman, L.P.
- Method for producing paper or cardboard3 Feb 2022US 2022/0033555 A1Solenis Technologies Cayman, L.P.
- Papers comprising aerogel powder and aramid polymer fibrils25 Nov 2021US 2021/0363699 A1Dupont Safety & Construction, Inc.
Most cited
By later US patents