D21H 21/06
Paper forming aids
D21H21/06 (Paper forming aids) appears on 695 US grants and 599 published applications in this corpus.
Search patents in D21H- Granted patents
- 695
- Published applications
- 599
- Assignees
- 260
- Inventors
- 1,446
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 1 | 0 |
| 1977 | 0 | 0 |
| 1978 | 4 | 0 |
| 1979 | 1 | 0 |
| 1980 | 0 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 7 | 0 |
| 1989 | 6 | 0 |
| 1990 | 11 | 0 |
| 1991 | 9 | 0 |
| 1992 | 10 | 0 |
| 1993 | 15 | 0 |
| 1994 | 6 | 0 |
| 1995 | 16 | 0 |
| 1996 | 24 | 0 |
| 1997 | 20 | 0 |
| 1998 | 23 | 0 |
| 1999 | 25 | 0 |
| 2000 | 28 | 0 |
| 2001 | 25 | 7 |
| 2002 | 29 | 17 |
| 2003 | 20 | 19 |
| 2004 | 16 | 21 |
| 2005 | 7 | 23 |
| 2006 | 7 | 34 |
| 2007 | 15 | 16 |
| 2008 | 9 | 21 |
| 2009 | 11 | 20 |
| 2010 | 14 | 29 |
| 2011 | 23 | 24 |
| 2012 | 18 | 15 |
| 2013 | 25 | 23 |
| 2014 | 25 | 20 |
| 2015 | 17 | 35 |
| 2016 | 17 | 24 |
| 2017 | 22 | 25 |
| 2018 | 25 | 27 |
| 2019 | 14 | 32 |
| 2020 | 34 | 28 |
| 2021 | 21 | 24 |
| 2022 | 27 | 22 |
| 2023 | 13 | 35 |
| 2024 | 17 | 28 |
| 2025 | 18 | 15 |
| 2026 | 15 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Cellulosic fiber material and process29 Sep 2026US 12,747,537 B2PaperShell AB
- Gas barrier film for packaging material25 Aug 2026US 12,715,668 B2Stora Enso OYJ
- Additive compositions for papermaking5 May 2026US 12,618,197 B2Solenis Technologies, L.P.
- Sanitary tissue product towels comprising non-wood fibers21 Apr 2026US 12,606,961 B2The Procter & Gamble Company
- Paper and pulp foam control agent31 Mar 2026US 12,590,414 B2Dow Global Technologies LLC
- Packing material and manufacturing method of packing material13 Aug 2026US 2026/0234872 A1Sony Group Corporation
- Water soluble amphoteric emulsion terpolymers, methods of making, and methods of use as retention and dewatering aids30 Jul 2026US 2026/0218455 A1
- Premium Sanitary Tissue Products Comprising Non-wood Fibers30 Jul 2026US 2026/0218456 A1The Procter & Gamble Company
- Method30 Jul 2026US 2026/0218459 A1
- Stretchable paper23 Jul 2026US 2026/0210057 A1Billerud Aktiebolag (publ)
Most cited
By later US patents
- Production of paper and paperboard198US 4,753,710 AAllied Colloids Limited · 1988
- Polysilicate microgels as retention/drainage aids in papermaking126US 4,954,220 AE. I. Du Pont de Nemours and Company · 1990
- Process for production of paper or board123US 9,605,382 B2Kemira Oyj · 2017
- Production of paper and paper board121US 4,913,775 AAllied Colloids Limited · 1990
- Bulk enhanced paperboard and shaped products made therefrom117US 6,379,497 B1Fort James Corporation · 2002