D21H 5/24
Special paper or cardboard not otherwise provided for: having enhanced flexibility or
Official title: {having enhanced flexibility or extensibility produced by mechanical treatment of the unfinished paper (crêping paper B31F1/12; making patterned paper D21F11/006, apertured paper D21F11/008)}
D21H5/24 (Special paper or cardboard not otherwise provided for: having enhanced flexibility or) appears on 28 US grants and 19 published applications in this corpus.
Search patents in D21H- Granted patents
- 28
- Published applications
- 19
- Assignees
- 9
- Inventors
- 20
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 3 | 0 |
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 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 | 0 |
| 2015 | 0 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 1 | 3 |
| 2019 | 0 | 0 |
| 2020 | 2 | 1 |
| 2021 | 0 | 4 |
| 2022 | 3 | 3 |
| 2023 | 5 | 3 |
| 2024 | 3 | 1 |
| 2025 | 1 | 3 |
| 2026 | 1 | 0 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Extensible paper and its use in the production of expanded slit packaging wrap and void fill products22 Sep 2026US 12,741,798 B2HexcelPack, LLC
- Expanded slit sheet cushioning products with novel reduced dimension slit patterns11 Feb 2025US 12,221,260 B2HexcelPack, LLC
- Extensible paper and its use in the production of expanded slit packaging wrap and void fill products19 Nov 2024US 12,145,784 B2HexcelPack, LLC
- Expanded slit sheet cushioning products with novel slit pattern and paper properties8 Oct 2024US 12,110,159 B2HexcelPack, LLC
- Expanded slit sheet cushioning products with novel slit pattern and paper properties20 Feb 2024US 11,905,088 B2
- Expanded Slit Sheet Cushioning Product with Novel Reduced-Dimension Slit Patterns11 Dec 2025US 2025/0376311 A1HexcelPack, LLC
- Extensible paper and its use in the production of expanded slit packaging wrap and void fill products10 Jul 2025US 2025/0223090 A1HexcelPack, LLC
- Offset core device and a method of making the offset core device6 Feb 2025US 2025/0042120 A1Degrees of Freedom LLC
- Folded multi-layer expandable slit-sheet-paper systems, products and methods7 Nov 2024US 2024/0368839 A1
- Expanded slit sheet cushioning products with novel slit pattern and paper properties21 Dec 2023US 2023/0406585 A1HexcelPack, LLC
Most cited
By later US patents
- Apparatus and process for treating web material162US 4,551,199 ACrown Zellerbach Corporation · 1985
- Multiple layer formation process for creped tissue136US 4,166,001 AKimberly-Clark Corporation · 1979
- Fibrous tape base material85US 4,834,838 AJames River Corporation · 1989
- Method and apparatus for shrinking a travelling web of fibrous material80US 4,072,557 AJ. M. Voith GmbH · 1978
- Process for producing convoluted, fiberized, cellulose fibers and sheet products therefrom77US 4,036,679 ACrown Zellerbach Corporation · 1977