D21H 11/04
Kraft or sulfate pulp
D21H11/04 (Kraft or sulfate pulp) appears on 413 US grants and 497 published applications in this corpus.
Search patents in D21H- Granted patents
- 413
- Published applications
- 497
- Assignees
- 162
- Inventors
- 762
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 0 | 0 |
| 1978 | 2 | 0 |
| 1979 | 0 | 0 |
| 1980 | 1 | 0 |
| 1981 | 5 | 0 |
| 1982 | 2 | 0 |
| 1983 | 5 | 0 |
| 1984 | 2 | 0 |
| 1985 | 3 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 5 | 0 |
| 1989 | 5 | 0 |
| 1990 | 1 | 0 |
| 1991 | 0 | 0 |
| 1992 | 5 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 3 | 0 |
| 1996 | 1 | 0 |
| 1997 | 6 | 0 |
| 1998 | 1 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 3 | 0 |
| 2002 | 1 | 1 |
| 2003 | 4 | 9 |
| 2004 | 2 | 4 |
| 2005 | 5 | 1 |
| 2006 | 0 | 3 |
| 2007 | 1 | 3 |
| 2008 | 0 | 3 |
| 2009 | 0 | 7 |
| 2010 | 2 | 2 |
| 2011 | 6 | 9 |
| 2012 | 12 | 10 |
| 2013 | 3 | 15 |
| 2014 | 12 | 22 |
| 2015 | 23 | 58 |
| 2016 | 43 | 44 |
| 2017 | 28 | 38 |
| 2018 | 28 | 27 |
| 2019 | 22 | 39 |
| 2020 | 33 | 30 |
| 2021 | 25 | 30 |
| 2022 | 23 | 29 |
| 2023 | 21 | 27 |
| 2024 | 24 | 31 |
| 2025 | 17 | 29 |
| 2026 | 14 | 26 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Corrugated board for humid conditions6 Oct 2026US 12,753,554 B2Billerud Aktiebolag (publ)
- Multi-ply liner with washed NSSC pulp29 Sep 2026US 12,747,539 B2Stora Enso OYJ
- Assymetric paperboard25 Aug 2026US 12,716,176 B2Billerud Aktiebolag (publ)
- Multi-ply liner for use in corrugated board28 Jul 2026US 12,692,664 B2Stora Enso OYJ
- System and method for the removal of non-process elements from electrostatic precipitator ashes in a kraft pulp process14 Jul 2026US 12,680,228 B2L Air Liquide, Societe Anonyme Pour L'Etude et L'Exploitation des Procedes Georges Claude
- Single layer coated white kraftliner8 Oct 2026US 2026/0308847 A1
- Packaging web material, packaging pouch and process for forming a packaging pouch24 Sep 2026US 2026/0286615 A1Mondi AG
- Use of a paper substrate, the barrier-coated paper substrate, a laminated packaging material and packaging container comprising it17 Sep 2026US 2026/0275650 A1Tetra Laval Holdings & Finance S. A.
- Process for producing a fibrous material27 Aug 2026US 2026/0250912 A1Stora Enso OYJ
- Carbon material precursor and method for producing carbon material using same30 Jul 2026US 2026/0218454 A1Nippon Paper Industries Co., Ltd.
Most cited
By later US patents
- Paper towels having bulky inner layer140US 5,087,324 AJames River Corporation of Virginia · 1992
- Process for making soft, strong cellulosic sheet and products made thereby136US 4,795,530 AKimberly-Clark Corporation · 1989
- Conductive laminate flooring134US 4,724,187 ANevamar Corporation · 1988
- Sanitary tissue products114US 9,322,136 B2The Procter & Gamble Company · 2016
- High water absorbent double-recreped fibrous webs112US 5,674,590 AKimberly-Clark Tissue Company · 1997