D21H 19/22
Polyalkenes
Official title: Polyalkenes, e.g. polystyrene
D21H19/22 (Polyalkenes) appears on 222 US grants and 309 published applications in this corpus.
Search patents in D21H- Granted patents
- 222
- Published applications
- 309
- Assignees
- 169
- Inventors
- 750
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 5 | 0 |
| 1977 | 2 | 0 |
| 1978 | 3 | 0 |
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 1 | 0 |
| 1984 | 2 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 2 | 0 |
| 1990 | 4 | 0 |
| 1991 | 3 | 0 |
| 1992 | 1 | 0 |
| 1993 | 4 | 0 |
| 1994 | 3 | 0 |
| 1995 | 6 | 0 |
| 1996 | 3 | 0 |
| 1997 | 2 | 0 |
| 1998 | 5 | 0 |
| 1999 | 4 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 1 |
| 2002 | 2 | 5 |
| 2003 | 3 | 4 |
| 2004 | 2 | 4 |
| 2005 | 4 | 8 |
| 2006 | 0 | 2 |
| 2007 | 3 | 9 |
| 2008 | 3 | 8 |
| 2009 | 1 | 2 |
| 2010 | 6 | 8 |
| 2011 | 6 | 8 |
| 2012 | 3 | 3 |
| 2013 | 5 | 6 |
| 2014 | 5 | 9 |
| 2015 | 2 | 7 |
| 2016 | 3 | 13 |
| 2017 | 6 | 11 |
| 2018 | 4 | 13 |
| 2019 | 11 | 19 |
| 2020 | 16 | 18 |
| 2021 | 12 | 16 |
| 2022 | 16 | 19 |
| 2023 | 12 | 27 |
| 2024 | 12 | 19 |
| 2025 | 11 | 39 |
| 2026 | 10 | 31 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Laminate and roll22 Sep 2026US 12,742,290 B2Toppan Holdings Inc.
- Aqueous dispersion, aqueous emulsion, coating agent, coated paper, multilayer structure, packing material, adhesive agent, and aqueous emulsion production method15 Sep 2026US 12,735,517 B2Kuraray Co., Ltd.
- Barrier paper or barrier film comprising highly refined pulp from fibers obtained from used beverage cartons25 Aug 2026US 12,716,173 B2Stora Enso OYJ
- Coated paper18 Aug 2026US 12,709,844 B2Koehler Innovation & Technology GmbH
- Durable tissue product14 Jul 2026US 12,680,233 B2Kimberly-Clark Worldwide, Inc.
- Method for coating a hollow container comprising molded pulp8 Oct 2026US 2026/0308853 A1
- Coating apparatus for coating a hollow container comprising molded pulp1 Oct 2026US 2026/0297855 A1
- Heat-sealable paper and packaging bag24 Sep 2026US 2026/0286610 A1Oji Holdings Corporation
- Layered structure27 Aug 2026US 2026/0249600 A1Camm Solutions (Spain) R&D, S.L.U.
- Multilayer structure, roll-shaped structure, and packaging material20 Aug 2026US 2026/0243027 A1Kuraray Co., Ltd.
Most cited
By later US patents
- Syntactic foam insulated container87US 5,952,068 AInsulation Dimension Corporation · 1999
- Process for producing moisture and water-proof paper84US 4,117,199 AOji Paper Co., Ltd. · 1978
- Self-bonding syntactic foam insulated container sleeve62US 6,265,040 B1Insulation Dimension Corporation · 2001
- Low density paper and paperboard articles60US 6,802,938 B2International Paper Company · 2004
- Creping process and products made therefrom53US 7,883,604 B2Kimberly-Clark Worldwide, Inc. · 2011