D21H 23/72
Plural serial stages only
D21H23/72 (Plural serial stages only) appears on 57 US grants and 62 published applications in this corpus.
Search patents in D21H- Granted patents
- 57
- Published applications
- 62
- Assignees
- 50
- Inventors
- 145
- Latest grant
- 7 Jul 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 0 | 0 |
| 1979 | 0 | 0 |
| 1980 | 0 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
| 1995 | 2 | 0 |
| 1996 | 1 | 0 |
| 1997 | 1 | 0 |
| 1998 | 2 | 0 |
| 1999 | 1 | 0 |
| 2000 | 3 | 0 |
| 2001 | 5 | 2 |
| 2002 | 4 | 4 |
| 2003 | 2 | 1 |
| 2004 | 3 | 2 |
| 2005 | 3 | 3 |
| 2006 | 0 | 1 |
| 2007 | 0 | 3 |
| 2008 | 1 | 3 |
| 2009 | 2 | 1 |
| 2010 | 0 | 1 |
| 2011 | 0 | 0 |
| 2012 | 0 | 2 |
| 2013 | 0 | 1 |
| 2014 | 1 | 1 |
| 2015 | 2 | 2 |
| 2016 | 3 | 2 |
| 2017 | 2 | 5 |
| 2018 | 2 | 2 |
| 2019 | 3 | 2 |
| 2020 | 0 | 2 |
| 2021 | 1 | 2 |
| 2022 | 3 | 1 |
| 2023 | 1 | 3 |
| 2024 | 0 | 9 |
| 2025 | 1 | 3 |
| 2026 | 3 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Method for coating a hollow container comprising molded pulp7 Jul 2026US 12,674,284 B2Alpla Werke Alwin Lehner GmbH & Co. KG
- Metalized powder painted color sample16 Jun 2026US 12,654,484 B2Color Communications, Inc.
- Method for controlling decomposition of corrosion-resistant paper10 Feb 2026US 12,546,063 B2Nippon Beet Sugar Manufacturing Co., Ltd.
- Packaging material for packaging of liquid and food22 Jul 2025US 12,366,039 B2Stora Enso OYJ
- Fiber body forming method and fiber body forming apparatus20 Jun 2023US 11,680,372 B2Seiko Epson Corporation
- Method for coating a hollow container comprising molded pulp8 Oct 2026US 2026/0308853 A1
- Coating apparatus for coating a hollow container comprising molded pulp1 Oct 2026US 2026/0297855 A1
- Metalized Powder Painted Color Sample10 Sep 2026US 2026/0264445 A1Color Communications, Inc.
- Method and composition providing enhanced alcohol barrier for paper packaging applications15 Jan 2026US 2026/0015798 A1Smart Planet Technologies, Inc.
- Water-Based Coatings for Cellulosic Substrates11 Sep 2025US 2025/0283278 A1Sun Chemical Corporation
Most cited
By later US patents
- Process for applying chemical papermaking additives to web substrate85US 6,126,784 AThe Procter & Gamble Company · 2000
- Method for producing barrier packaging23US 5,418,008 AWestvaco Corporation · 1995
- Heat sealed, ovenable food carton lids22US 5,425,972 AWestvaco Corporation · 1995
- System for selective treatment of a traveling paper web22US 6,051,068 AVoith Sulzer Papiermaschinen GmbH · 2000
- Process and apparatus for coating paper16US 4,657,783 AThe Wiggins Teape Group Limited · 1987