D21H 13/14
Polyalkenes
Official title: Polyalkenes, e.g. polystyrene {polyethylene}
D21H13/14 (Polyalkenes) appears on 232 US grants and 151 published applications in this corpus.
Search patents in D21H- Granted patents
- 232
- Published applications
- 151
- Assignees
- 143
- Inventors
- 517
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 10 | 0 |
| 1977 | 8 | 0 |
| 1978 | 7 | 0 |
| 1979 | 10 | 0 |
| 1980 | 4 | 0 |
| 1981 | 9 | 0 |
| 1982 | 1 | 0 |
| 1983 | 7 | 0 |
| 1984 | 4 | 0 |
| 1985 | 4 | 0 |
| 1986 | 4 | 0 |
| 1987 | 5 | 0 |
| 1988 | 2 | 0 |
| 1989 | 2 | 0 |
| 1990 | 6 | 0 |
| 1991 | 6 | 0 |
| 1992 | 8 | 0 |
| 1993 | 3 | 0 |
| 1994 | 0 | 0 |
| 1995 | 4 | 0 |
| 1996 | 4 | 0 |
| 1997 | 2 | 0 |
| 1998 | 4 | 0 |
| 1999 | 5 | 0 |
| 2000 | 5 | 0 |
| 2001 | 12 | 1 |
| 2002 | 6 | 8 |
| 2003 | 4 | 14 |
| 2004 | 6 | 3 |
| 2005 | 5 | 5 |
| 2006 | 1 | 2 |
| 2007 | 2 | 9 |
| 2008 | 2 | 2 |
| 2009 | 0 | 5 |
| 2010 | 2 | 4 |
| 2011 | 2 | 2 |
| 2012 | 4 | 9 |
| 2013 | 5 | 2 |
| 2014 | 1 | 2 |
| 2015 | 1 | 8 |
| 2016 | 1 | 3 |
| 2017 | 5 | 10 |
| 2018 | 4 | 5 |
| 2019 | 4 | 8 |
| 2020 | 4 | 9 |
| 2021 | 10 | 12 |
| 2022 | 8 | 10 |
| 2023 | 7 | 8 |
| 2024 | 7 | 3 |
| 2025 | 3 | 4 |
| 2026 | 2 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Thermoplastic sheets and articles with variable lofting capacity26 May 2026US 12,636,852 B2Hanwha Azdel, Inc.
- Insulation material and method of making insulation material3 Mar 2026US 12,565,371 B2MP Global Products, L.L.C.
- Repulpable container22 Jul 2025US 12,365,529 B2Pratt Retail Specialties, LLC
- Carpet tile with wet laid dual layer nonwoven mat3 Jun 2025US 12,320,064 B2Johns Manville
- Ply fibrous product20 May 2025US 12,305,336 B2Essity Hygiene and Health Aktiebolag
- Inorganic fiber sheet23 Jul 2026US 2026/0208083 A1Tomoegawa Co., Ltd.
- Insulation Material And Method Of Making Insulation Material9 Jul 2026US 2026/0193014 A1MP Global Products, L.L.C.
- Packaging material and a pouched product for oral use16 Apr 2026US 2026/0103846 A1Swedish Match North Europe AB
- Conductive paper, production method thereof, metallic adherend and production method thereof30 Oct 2025US 2025/0333906 A1NSK-Warner K. K.
- Dual layer wet laid nonwoven mat21 Aug 2025US 2025/0263888 A1Johns Manville
Most cited
By later US patents
- Dispersible nonwoven fabric and method of making same166US 5,935,880 A1999
- Filtration structures of wet laid, bicomponent fiber148US 5,580,459 AHoechst Celanese Corporation · 1996
- Cloth-like base sheet and method for making the same144US 6,315,864 B2Kimberly-Clark Worldwide, Inc. · 2001
- Cellulose-Based medical packaging material sterilizable by oxidizing gas plasma127US 6,156,677 AKimberly-Clark Worldwide, Inc. · 2000
- Method of making an insulation material and an insulated mailer104US 10,583,977 B2MP Global Products, L.L.C. · 2020