D21H 17/35
Polyalkenes
Official title: Polyalkenes, e.g. polystyrene
D21H17/35 (Polyalkenes) appears on 201 US grants and 154 published applications in this corpus.
Search patents in D21H- Granted patents
- 201
- Published applications
- 154
- Assignees
- 143
- Inventors
- 551
- Latest grant
- 1 Jul 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 8 | 0 |
| 1977 | 3 | 0 |
| 1978 | 5 | 0 |
| 1979 | 1 | 0 |
| 1980 | 6 | 0 |
| 1981 | 3 | 0 |
| 1982 | 2 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 7 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 1 | 0 |
| 1989 | 6 | 0 |
| 1990 | 3 | 0 |
| 1991 | 3 | 0 |
| 1992 | 5 | 0 |
| 1993 | 3 | 0 |
| 1994 | 2 | 0 |
| 1995 | 2 | 0 |
| 1996 | 4 | 0 |
| 1997 | 5 | 0 |
| 1998 | 3 | 0 |
| 1999 | 5 | 0 |
| 2000 | 3 | 0 |
| 2001 | 2 | 1 |
| 2002 | 7 | 6 |
| 2003 | 6 | 6 |
| 2004 | 2 | 5 |
| 2005 | 4 | 3 |
| 2006 | 1 | 5 |
| 2007 | 3 | 9 |
| 2008 | 0 | 11 |
| 2009 | 0 | 7 |
| 2010 | 8 | 13 |
| 2011 | 7 | 7 |
| 2012 | 6 | 9 |
| 2013 | 8 | 9 |
| 2014 | 7 | 9 |
| 2015 | 1 | 8 |
| 2016 | 6 | 4 |
| 2017 | 2 | 9 |
| 2018 | 2 | 8 |
| 2019 | 8 | 5 |
| 2020 | 5 | 5 |
| 2021 | 4 | 3 |
| 2022 | 7 | 4 |
| 2023 | 3 | 3 |
| 2024 | 5 | 2 |
| 2025 | 1 | 1 |
| 2026 | 0 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Tissue product made using laser engraved structuring belt1 Jul 2025US 12,344,997 B2Structured I, LLC
- Transfer material for sublimation printing based on paper as the carrier, with an ink blocking function31 Dec 2024US 12,180,650 B2Schoeller Technocell GmbH & Co.KG
- Paper coated with a functional polyolefin film24 Dec 2024US 12,173,452 B2Dow Global Technologies LLC
- Fibrous sheet with improved properties23 Jul 2024US 12,043,963 B2
- Tissue product made using laser engraved structuring belt11 Jun 2024US 12,006,635 B2Structured I, LLC
- Method for manufacturing paper-making filler using mixed solution of organic fiber and inorganic compound and use thereof1 Oct 2026US 2026/0297850 A1MarinePad Co., Ltd.
- Composite materials and methods for preparing the same with latent acid catalysts25 Jun 2026US 2026/0176453 A1Neenah, Inc.
- Tissue product made using laser engraved structuring belt26 Jun 2025US 2025/0207334 A1Structured I, LLC
- Transfer material for sublimation printing based on paper as the carrier, with an ink blocking function16 May 2024US 2024/0158987 A1Schoeller Technocell GmbH & Co.KG
- A container4 Jan 2024US 2024/0002121 A1Nicoventures Trading Limited
Most cited
By later US patents
- Highly filled sheets and method of preparation thereof125US 4,225,383 AThe Dow Chemical Company · 1980
- Discontinuous cellulose fiber treated with plastic polymer and lubricant109US 3,943,079 AMonsanto Company · 1976
- Lumen-loaded paper pulp, its production and use81US 4,510,020 APulp and Paper Research Institute of Canada · 1985
- Graft polymers of natural substances containing saccharide structures or derivatives thereof and ethylenically unsaturated compounds and their use81US 5,578,678 ABASF SE · 1996
- Method for producing fibrous sheet65US 4,121,966 AMitsubishi Paper Mills Limited · 1978