D21H 21/50
Non-fibrous material added to the pulp, characterised by its function, form or
Official title: characterised by form (D21H19/66, D21H21/42, D21H27/02 take precedence)
D21H21/50 (Non-fibrous material added to the pulp, characterised by its function, form or) appears on 684 US grants and 803 published applications in this corpus.
Search patents in D21H- Granted patents
- 684
- Published applications
- 803
- Assignees
- 432
- Inventors
- 1,928
- Latest grant
- 11 Aug 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 5 | 0 |
| 1978 | 6 | 0 |
| 1979 | 3 | 0 |
| 1980 | 4 | 0 |
| 1981 | 9 | 0 |
| 1982 | 6 | 0 |
| 1983 | 9 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 5 | 0 |
| 1987 | 4 | 0 |
| 1988 | 3 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 10 | 0 |
| 1993 | 13 | 0 |
| 1994 | 11 | 0 |
| 1995 | 5 | 0 |
| 1996 | 6 | 0 |
| 1997 | 11 | 0 |
| 1998 | 8 | 0 |
| 1999 | 19 | 0 |
| 2000 | 8 | 0 |
| 2001 | 11 | 4 |
| 2002 | 14 | 22 |
| 2003 | 20 | 34 |
| 2004 | 19 | 33 |
| 2005 | 12 | 38 |
| 2006 | 11 | 48 |
| 2007 | 14 | 35 |
| 2008 | 10 | 33 |
| 2009 | 11 | 18 |
| 2010 | 21 | 30 |
| 2011 | 18 | 22 |
| 2012 | 17 | 16 |
| 2013 | 22 | 34 |
| 2014 | 22 | 30 |
| 2015 | 16 | 39 |
| 2016 | 15 | 24 |
| 2017 | 27 | 38 |
| 2018 | 20 | 36 |
| 2019 | 29 | 45 |
| 2020 | 36 | 41 |
| 2021 | 37 | 35 |
| 2022 | 27 | 41 |
| 2023 | 24 | 32 |
| 2024 | 23 | 32 |
| 2025 | 21 | 23 |
| 2026 | 13 | 20 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods and compositions related to lanthanide-encoded microbeads11 Aug 2026US 12,702,963 B2CZ Biohub SF, LLC
- Biodegradable boards and methods of making the same11 Aug 2026US 12,703,946 B2Kraft Foods Schweiz Holding GmbH
- Process for producing precipitated calcium carbonate in the presence of natural ground calcium carbonate19 May 2026US 12,630,438 B2Omya International AG
- Paper product for flow wrapping19 May 2026US 12,630,746 B2Billerud Aktiebolag (publ)
- Method for manufacturing a barrier film comprising highly refined cellulose12 May 2026US 12,624,501 B2Stora Enso OYJ
- Packing material and manufacturing method of packing material13 Aug 2026US 2026/0234872 A1Sony Group Corporation
- Foam-Based Manufacturing System and Process6 Aug 2026US 2026/0226679 A1Kimberly-Clark Worldwide, Inc.
- Method for producing a solid cellulose foam, a solid cellulose foam, and use thereof6 Aug 2026US 2026/0226684 A1Stora Enso OYJ
- Clothing item including at least one three-dimensional contour, and method of making the same30 Jul 2026US 2026/0216967 A1Simplifyber, Inc.
- Foam-Based Manufacturing System and Process23 Jul 2026US 2026/0210038 A1Kimberly-Clark Worldwide, Inc.
Most cited
By later US patents
- Papermaking and products made thereby159US 4,388,150 AEKA Aktiebolag · 1983
- Bulk enhanced paperboard and shaped products made therefrom117US 6,379,497 B1Fort James Corporation · 2002
- Coated paperboards and paperboard containers having improved tactile and bulk insulation properties117US 6,740,373 B1Fort James Corporation · 2004
- Method of making an insulation material and an insulated mailer104US 10,583,977 B2MP Global Products, L.L.C. · 2020
- Repulpable container95US 10,882,682 B2Pratt Retail Specialties, LLC · 2021