D21H 27/30
Multi-ply
Official title: Multi-ply (for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00)
D21H27/30 (Multi-ply) appears on 1,587 US grants and 1,845 published applications in this corpus.
Search patents in D21H- Granted patents
- 1,587
- Published applications
- 1,845
- Assignees
- 566
- Inventors
- 2,898
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 15 | 0 |
| 1977 | 8 | 0 |
| 1978 | 12 | 0 |
| 1979 | 2 | 0 |
| 1980 | 5 | 0 |
| 1981 | 8 | 0 |
| 1982 | 9 | 0 |
| 1983 | 12 | 0 |
| 1984 | 18 | 0 |
| 1985 | 8 | 0 |
| 1986 | 6 | 0 |
| 1987 | 8 | 0 |
| 1988 | 14 | 0 |
| 1989 | 10 | 0 |
| 1990 | 14 | 0 |
| 1991 | 12 | 0 |
| 1992 | 12 | 0 |
| 1993 | 12 | 0 |
| 1994 | 1 | 0 |
| 1995 | 21 | 0 |
| 1996 | 16 | 0 |
| 1997 | 33 | 0 |
| 1998 | 23 | 0 |
| 1999 | 30 | 0 |
| 2000 | 30 | 0 |
| 2001 | 35 | 3 |
| 2002 | 25 | 26 |
| 2003 | 32 | 60 |
| 2004 | 32 | 60 |
| 2005 | 24 | 53 |
| 2006 | 19 | 44 |
| 2007 | 16 | 49 |
| 2008 | 18 | 43 |
| 2009 | 15 | 45 |
| 2010 | 32 | 56 |
| 2011 | 35 | 49 |
| 2012 | 35 | 52 |
| 2013 | 49 | 62 |
| 2014 | 42 | 60 |
| 2015 | 48 | 83 |
| 2016 | 56 | 78 |
| 2017 | 43 | 97 |
| 2018 | 61 | 97 |
| 2019 | 63 | 83 |
| 2020 | 96 | 117 |
| 2021 | 78 | 115 |
| 2022 | 80 | 122 |
| 2023 | 97 | 123 |
| 2024 | 85 | 104 |
| 2025 | 79 | 89 |
| 2026 | 53 | 75 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Corrugated board for humid conditions6 Oct 2026US 12,753,554 B2Billerud Aktiebolag (publ)
- Cellulosic fiber material and process29 Sep 2026US 12,747,537 B2PaperShell AB
- Method for producing a multilayer machine glazed paper comprising highly refined cellulose fibers and a multilayer machine glazed paper produced29 Sep 2026US 12,747,538 B2Stora Enso OYJ
- Multi-ply liner with washed NSSC pulp29 Sep 2026US 12,747,539 B2Stora Enso OYJ
- Impregnating coating layer for insulating sheetsand multilayer laminates15 Sep 2026US 12,734,766 B2Coveme S.P.A.
- Arrays of sanitary tissue products comprising non-wood(s)8 Oct 2026US 2026/0307891 A1The Procter & Gamble Company
- Soft treated tissue product8 Oct 2026US 2026/0308852 A1Kimberly-Clark Worldwide, Inc.
- Paperboard comprising recycled fibres24 Sep 2026US 2026/0286608 A1Billerud Aktiebolag (publ)
- Discrete cells and emboss elements17 Sep 2026US 2026/0275645 A1The Procter & Gamble Company
- Multi-ply tissue products and methods of manufacturing the same17 Sep 2026US 2026/0275646 A1Kimberly-Clark Worldwide, Inc.
Most cited
By later US patents
- Method for making a fibrous structure comprising cellulosic and synthetic fibers1,393US 7,354,502 B2The Procter & Gamble Company · 2008
- Hesperaloe tissue having improved cross-machine direction properties809US 10,337,148 B2Kimberly-Clark Worldwide, Inc. · 2019
- Substrate for wallboard joint tape and process for making same802US 10,106,932 B2International Paper Company · 2018
- Soft tissue406US 5,607,551 AKimberly-Clark Corporation · 1997
- Layered paper having a soft and smooth velutinous surface, and method of making such paper360US 4,300,981 AThe Procter & Gamble Company · 1981