B01D 2239/1275
Stiffness
B01D2239/1275 (Stiffness) appears on 22 US grants and 46 published applications in this corpus.
Search patents in B01D- Granted patents
- 22
- Published applications
- 46
- Assignees
- 15
- Inventors
- 87
- Latest grant
- 30 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2007 | 0 | 1 |
| 2008 | 0 | 0 |
| 2009 | 0 | 0 |
| 2010 | 0 | 1 |
| 2011 | 2 | 1 |
| 2012 | 0 | 1 |
| 2013 | 0 | 0 |
| 2014 | 1 | 1 |
| 2015 | 1 | 0 |
| 2016 | 0 | 1 |
| 2017 | 0 | 0 |
| 2018 | 0 | 5 |
| 2019 | 0 | 4 |
| 2020 | 2 | 5 |
| 2021 | 2 | 6 |
| 2022 | 5 | 6 |
| 2023 | 2 | 4 |
| 2024 | 4 | 3 |
| 2025 | 2 | 4 |
| 2026 | 1 | 3 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Multifunctional filter materials30 Jun 2026US 12,667,143 B2Khalifa University of Science and Technology
- Filter media including out-of-plane solid elements, methods of forming them, and uses thereof1 Jul 2025US 12,343,666 B2Hollingsworth & Vose Company
- Filter media, elements, and methods25 Feb 2025US 12,233,367 B2Donaldson Company, Inc.
- Filter media including adhesives and/or oleophobic properties27 Aug 2024US 12,070,705 B2Hollingsworth & Vose Company
- Filter media with irregular structure16 Jul 2024US 12,036,496 B2Hollingsworth & Vose Company
- Multifunctional filter materials8 Oct 2026US 2026/0305741 A1Khalifa University of Science and Technology
- Fluorocarbon-free filtration media9 Jul 2026US 2026/0192223 A1Unifrax I LLC
- Pulse filter7 May 2026US 2026/0124566 A1
- Filter For The Filtration Of A Liquid Metal30 Oct 2025US 2025/0332636 A1Les Produits Industriels de Haute Temperature Pyrotek Inc.
- Filter media including out-of-plane solid elements, methods of forming them, and uses thereof11 Sep 2025US 2025/0281860 A1Hollingsworth & Vose Company
Most cited
By later US patents
- Fiber web having a high stiffness19US 8,083,828 B2Hollingsworth & Vose Company · 2011
- Filter media with improved conductivity7US 7,964,012 B2Hollingsworth & Vose Company · 2011
- Filter media including adhesives and/or oleophobic properties6US 10,543,441 B2Hollingsworth & Vose Company · 2020
- Systems and methods for swimming pool filtration5US 11,332,951 B22022
- Filter media including adhesives4US 10,898,838 B2Hollingsworth & Vose Company · 2021