B01D 39/1646
Of natural origin
Official title: {of natural origin, e.g. cork or peat}
B01D39/1646 (Of natural origin) appears on 12 US grants and 21 published applications in this corpus.
Search patents in B01D- Granted patents
- 12
- Published applications
- 21
- Assignees
- 12
- Inventors
- 35
- Latest grant
- 9 Sep 2025
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 2 | 0 |
| 2010 | 0 | 2 |
| 2011 | 0 | 0 |
| 2012 | 2 | 0 |
| 2013 | 0 | 0 |
| 2014 | 0 | 1 |
| 2015 | 0 | 0 |
| 2016 | 0 | 0 |
| 2017 | 0 | 1 |
| 2018 | 0 | 0 |
| 2019 | 0 | 3 |
| 2020 | 0 | 1 |
| 2021 | 1 | 1 |
| 2022 | 1 | 2 |
| 2023 | 2 | 3 |
| 2024 | 2 | 1 |
| 2025 | 2 | 2 |
| 2026 | 0 | 1 |
By publication year. 2026 runs to 8 Oct.
Recent patents
- Air purification filter and air purifier including same9 Sep 2025US 12,409,458 B2LG Electronics Inc.
- Activated hemp filters and method of making activated hemp filters27 May 2025US 12,311,295 B2Hemp-Shire LLC
- Industrial wastewater treatment system and method for garment finishing, jeans and denim industry3 Dec 2024US 12,157,692 B2Jeanologia, S. L.
- Vacuum cleaner filter bag with powdery and/or fibrous recycled material13 Feb 2024US 11,896,922 B2Eurofilters N. V.
- Activated hemp filters and method of making activated hemp filters5 Dec 2023US 11,833,460 B2Hemp-Shire, LLD
- Hydrophobic filter medium12 Feb 2026US 2026/0042043 A1
- Filter member27 Feb 2025US 2025/0065252 A1Roki Techno Co., Ltd.
- Ceramic filter and container for liquids comprising said ceramic filter2 Jan 2025US 2025/0001340 A1
- Activated hemp filters and method of making activated hemp filters29 Feb 2024US 2024/0066448 A1Hemp-Shire LLC
- Method for generating a granular, green sorbent media for filtration of contaminated water by processing aluminum-based drinking water treatment residuals21 Dec 2023US 2023/0405546 A1The Trustees of the Stevens Institute of Technology
Most cited
By later US patents
- Differential filters for stopping water during oil production12US 7,637,320 B2Schlumberger Technology Corporation · 2009
- Adsorption filter material, particularly for producing ABC protective clothing having improved wearing physiology3US 8,266,726 B22012
- Activated hemp filters and method of making activated hemp filters1US 11,027,229 B1Hemp-Shire LLC · 2021
- Vacuum cleaner filter bag made from recycled plastic1US 11,504,662 B2Eurofilters N. V. · 2022
- Granular green sorbent media for filtration of contaminated water1US 11,673,114 B2The Trustees of the Stevens Institute of Technology · 2023