D21H 23/56
Rolls
Official title: Rolls (D21H23/38 takes precedence)
D21H23/56 (Rolls) appears on 286 US grants and 227 published applications in this corpus.
Search patents in D21H- Granted patents
- 286
- Published applications
- 227
- Assignees
- 170
- Inventors
- 668
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 7 | 0 |
| 1977 | 5 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 1 | 0 |
| 1982 | 3 | 0 |
| 1983 | 3 | 0 |
| 1984 | 2 | 0 |
| 1985 | 5 | 0 |
| 1986 | 1 | 0 |
| 1987 | 2 | 0 |
| 1988 | 7 | 0 |
| 1989 | 4 | 0 |
| 1990 | 4 | 0 |
| 1991 | 4 | 0 |
| 1992 | 6 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 9 | 0 |
| 1996 | 7 | 0 |
| 1997 | 12 | 0 |
| 1998 | 15 | 0 |
| 1999 | 12 | 0 |
| 2000 | 9 | 0 |
| 2001 | 12 | 0 |
| 2002 | 5 | 6 |
| 2003 | 6 | 7 |
| 2004 | 6 | 10 |
| 2005 | 3 | 6 |
| 2006 | 3 | 6 |
| 2007 | 2 | 3 |
| 2008 | 4 | 12 |
| 2009 | 2 | 10 |
| 2010 | 1 | 8 |
| 2011 | 1 | 15 |
| 2012 | 4 | 10 |
| 2013 | 8 | 12 |
| 2014 | 8 | 17 |
| 2015 | 9 | 10 |
| 2016 | 7 | 15 |
| 2017 | 15 | 8 |
| 2018 | 7 | 7 |
| 2019 | 5 | 11 |
| 2020 | 7 | 9 |
| 2021 | 3 | 8 |
| 2022 | 9 | 8 |
| 2023 | 5 | 12 |
| 2024 | 6 | 9 |
| 2025 | 8 | 4 |
| 2026 | 4 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Smoking rolling paper and a method for packaging the same29 Sep 2026US 12,745,793 B2
- Slot die coating using concave die lip over deformable back-up roll15 Sep 2026US 12,734,544 B23M Innovative Properties Company
- Barrier recycled paperboard and method for manufacturing thereof5 May 2026US 12,618,198 B2WestRock MWV, LLC
- Unbleached natural brown copier paper and process thereof24 Feb 2026US 12,559,887 B2Shree Krishna Paper Mills and Industries Limited
- Yankee drying cylinder and a tissue paper making machine23 Sep 2025US 12,421,662 B2Valmet Corporation
- Barrier recycled paperboard and method for manufacturing thereof10 Sep 2026US 2026/0266001 A1WestRock MWV, LLC
- Dual emulsification of alkenyl succinic anhydride to improve sizing performance and stability20 Aug 2026US 2026/0243024 A1Kemira Oyj
- Thermal paper, and methods and systems for forming the same16 Apr 2026US 2026/0103015 A1G13 Innovation in Production Ltd
- Flexible wall covering with virucidal coating and method for manufacture thereof15 Jan 2026US 2026/0015789 A1
- Heat sealable barrier material4 Dec 2025US 2025/0369191 A1Upm-Kymmene Corporation
Most cited
By later US patents
- Multi-ply absorbent wiping product having relatively inextensible center ply bonded to highly extensible outer plies172US 3,953,638 AThe Procter & Gamble Company · 1976
- Anti-bacterial/anti-viral coatings, coating process and parameters thereof129US 5,968,538 AViro-Kote, Inc. · 1999
- Process for applying chemical papermaking additives from a thin film to tissue paper98US 5,246,545 AThe Procter & Gamble Company · 1993
- Pattern bonding and creping of fibrous products90US 4,507,173 AJames River-Norwalk, Inc. · 1985
- Metering coatings77US 6,316,060 B1Pacifica Papers Inc. · 2001