B01D 71/262
Polypropylene
Official title: {Polypropylene}
B01D71/262 (Polypropylene) appears on 372 US grants and 456 published applications in this corpus.
Search patents in B01D- Granted patents
- 372
- Published applications
- 456
- Assignees
- 258
- Inventors
- 1,150
- Latest grant
- 15 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1979 | 1 | 0 |
| 1980 | 2 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 2 | 0 |
| 1984 | 1 | 0 |
| 1985 | 0 | 0 |
| 1986 | 2 | 0 |
| 1987 | 2 | 0 |
| 1988 | 8 | 0 |
| 1989 | 4 | 0 |
| 1990 | 6 | 0 |
| 1991 | 5 | 0 |
| 1992 | 5 | 0 |
| 1993 | 8 | 0 |
| 1994 | 5 | 0 |
| 1995 | 2 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 4 | 0 |
| 1999 | 3 | 0 |
| 2000 | 6 | 0 |
| 2001 | 4 | 0 |
| 2002 | 7 | 6 |
| 2003 | 7 | 7 |
| 2004 | 6 | 3 |
| 2005 | 2 | 9 |
| 2006 | 2 | 6 |
| 2007 | 0 | 8 |
| 2008 | 3 | 8 |
| 2009 | 2 | 18 |
| 2010 | 12 | 17 |
| 2011 | 9 | 23 |
| 2012 | 10 | 16 |
| 2013 | 14 | 19 |
| 2014 | 17 | 19 |
| 2015 | 20 | 25 |
| 2016 | 11 | 24 |
| 2017 | 16 | 26 |
| 2018 | 15 | 25 |
| 2019 | 17 | 22 |
| 2020 | 19 | 23 |
| 2021 | 23 | 35 |
| 2022 | 19 | 26 |
| 2023 | 13 | 32 |
| 2024 | 19 | 22 |
| 2025 | 16 | 22 |
| 2026 | 15 | 15 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Point of use or point of dispense filter with multiple pleat packs15 Sep 2026US 12,734,488 B2Entegris, Inc.
- Cross-linkable polymer compositions and applications thereof8 Sep 2026US 12,729,261 B2Notark Corporation
- Method for producing treatment liquid4 Aug 2026US 12,698,454 B2FUJIFILM Corporation
- Microporous membranes, underlayment, roofing, flashing, wrap, and methods for making and using the same14 Jul 2026US 12,678,741 B2Daramic, LLC
- System and method for dual-pathway system for carbon dioxide capture from ocean water30 Jun 2026US 12,668,518 B2California Institute of Technology
- Systems for catalytically removing per- and polyfluoroalkyl substances from a fluid and related methods1 Oct 2026US 2026/0296939 A1Arizona Board of Regents on behalf of Arizona State University
- Cross-linkable zwitterionic polymers and their use in membrane filters30 Jul 2026US 2026/0216671 A1Trustees of Tufts College
- A plasma processing system with a gas recycling system18 Jun 2026US 2026/0166479 A1Lam Research Corporation
- Mechanically enhanced porous polyolefin composites in biaxial direction using fillers with high aspect ratio18 Jun 2026US 2026/0167787 A1Atera Water Pte Ltd
- Systems and methods for tangential flow depth filtration21 May 2026US 2026/0138096 A1Repligen Corporation
Most cited
By later US patents
- Method of making polytetrafluoroethylene composite sheet203US 4,153,661 AMinnesota Mining and Manufacturing Company · 1979
- Oil, water and sweat repellent microporous membrane materials136US 5,260,360 AMinnesota Mining and Manufacturing Company · 1993
- Gas transfer process with hollow fiber membrane131US 4,268,279 AMitsubishi Rayon Co., Ltd. · 1981
- Puncture-resistant polyolefin membranes110US 6,096,213 A3M Innovative Properties Company · 2000
- Multi-component composite film method for preparing the same93US 7,470,488 B2LG Chemical Ltd. · 2008