D21H 23/48
Curtain coaters
D21H23/48 (Curtain coaters) appears on 115 US grants and 133 published applications in this corpus.
Search patents in D21H- Granted patents
- 115
- Published applications
- 133
- Assignees
- 77
- Inventors
- 279
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 2 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 2 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 3 | 0 |
| 1997 | 4 | 0 |
| 1998 | 3 | 0 |
| 1999 | 3 | 0 |
| 2000 | 1 | 0 |
| 2001 | 2 | 0 |
| 2002 | 3 | 5 |
| 2003 | 4 | 5 |
| 2004 | 1 | 10 |
| 2005 | 1 | 7 |
| 2006 | 2 | 9 |
| 2007 | 3 | 7 |
| 2008 | 2 | 10 |
| 2009 | 4 | 2 |
| 2010 | 5 | 13 |
| 2011 | 6 | 2 |
| 2012 | 0 | 1 |
| 2013 | 5 | 2 |
| 2014 | 1 | 6 |
| 2015 | 1 | 4 |
| 2016 | 1 | 6 |
| 2017 | 7 | 2 |
| 2018 | 6 | 4 |
| 2019 | 4 | 4 |
| 2020 | 2 | 9 |
| 2021 | 3 | 3 |
| 2022 | 6 | 6 |
| 2023 | 5 | 5 |
| 2024 | 3 | 7 |
| 2025 | 3 | 1 |
| 2026 | 3 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Polylactide formulation for improved extrusion processing6 Oct 2026US 12,753,555 B2WestRock MWV, LLC
- Coated paper18 Aug 2026US 12,709,844 B2Koehler Innovation & Technology GmbH
- Method for manufacturing a barrier film comprising highly refined cellulose12 May 2026US 12,624,501 B2Stora Enso OYJ
- Coated paper27 May 2025US 12,312,746 B2Koehler Innovation & Technology GmbH
- Multilayer film comprising highly refined cellulose fibers25 Mar 2025US 12,258,710 B2Stora Enso OYJ
- Bio-based composites as water vapor barrier on paper21 May 2026US 2026/0138799 A1Koehler Innovation & Technology GmbH
- Application device and method for coating a fibrous material web8 Jan 2026US 2026/0009184 A1Voith Patent GmbH
- Application device and method for coating a fibrous material web8 Jan 2026US 2026/0009187 A1Voith Patent GmbH
- A method and a system for manufacturing a paperboard8 May 2025US 2025/0146229 A1
- Application nozzle, application unit and method26 Dec 2024US 2024/0424519 A1Voith Patent GmbH
Most cited
By later US patents
- Three dimensional macroscopic assemblages of randomly oriented carbon fibrils and composites containing same76US 5,691,054 AHyperion Catalysis Int'l., Inc. · 1997
- Method and apparatus for coating substrates using an air knife51US 5,505,995 AMinnesota Mining and Manufacturing Company · 1996
- Curtain coater and method for curtain coating33US 6,743,478 B1Metso Paper, Inc. · 2004
- Method and apparatus for curtain coating29US 7,101,592 B2Dow Global Technologies LLC · 2006
- Curtain coating apparatus and curtain coating process28US 6,666,165 B2Mitsubishi Paper Mills Limited · 2003