B01D 61/027
Nanofiltration
Official title: {Nanofiltration}
B01D61/027 (Nanofiltration) appears on 909 US grants and 1,350 published applications in this corpus.
Search patents in B01D- Granted patents
- 909
- Published applications
- 1,350
- Assignees
- 756
- Inventors
- 3,061
- Latest grant
- 29 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 4 | 0 |
| 1992 | 3 | 0 |
| 1993 | 4 | 0 |
| 1994 | 6 | 0 |
| 1995 | 8 | 0 |
| 1996 | 14 | 0 |
| 1997 | 11 | 0 |
| 1998 | 8 | 0 |
| 1999 | 14 | 0 |
| 2000 | 16 | 0 |
| 2001 | 19 | 5 |
| 2002 | 13 | 14 |
| 2003 | 12 | 18 |
| 2004 | 9 | 24 |
| 2005 | 9 | 25 |
| 2006 | 12 | 27 |
| 2007 | 8 | 26 |
| 2008 | 14 | 29 |
| 2009 | 8 | 33 |
| 2010 | 15 | 43 |
| 2011 | 20 | 43 |
| 2012 | 22 | 50 |
| 2013 | 28 | 39 |
| 2014 | 38 | 64 |
| 2015 | 31 | 50 |
| 2016 | 32 | 70 |
| 2017 | 30 | 75 |
| 2018 | 43 | 79 |
| 2019 | 67 | 57 |
| 2020 | 65 | 92 |
| 2021 | 54 | 94 |
| 2022 | 53 | 81 |
| 2023 | 59 | 74 |
| 2024 | 53 | 89 |
| 2025 | 61 | 87 |
| 2026 | 44 | 62 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Method of forming a cross-linked polymeric membrane29 Sep 2026US 12,746,516 B2Seppure Pte Ltd
- Purification of oligosaccharides from a fermentation broth by using filtration15 Sep 2026US 12,735,443 B2Chr. Hansen A/S
- Preparation method of milk oligosaccharides and oligosaccharide powder and food prepared thereby15 Sep 2026US 12,735,512 B2Beijing Sanyuan Foods Co., Ltd.
- Thin-film composite membranes synthesized by multi-step coating methods18 Aug 2026US 12,708,881 B2Katholieke Universiteit Leuven
- Method for efficiently extracting and separating high-purity tetrodotoxin from pufferfish viscera18 Aug 2026US 12,709,618 B2Zhongyang Biotechnology (Shanghai) Co., LTD.
- System for determining filter status8 Oct 2026US 2026/0309611 A1
- Method for recovering alkali metal salt and apparatus for recovering alkali metal salt1 Oct 2026US 2026/0295533 A1Toray Industries, Inc.
- Process for the production and separation of 5- hydroxymethylfurfural with quaternary ammonium salts1 Oct 2026US 2026/0297047 A1Novamont S. p. A.
- Loss-free process for producing cathode active material without generating waste and wastewater24 Sep 2026US 2026/0285703 A1
- Continuous size-exclusion membrane separation of polyurethane deconstruction products for the recovery of pristine polyols24 Sep 2026US 2026/0286087 A1Alliance for Energy Innovation, LLC
Most cited
By later US patents
- Purification of gases from water using reverse osmosis144US 5,670,053 AZenon Environmental Inc. · 1997
- High water recovery membrane purification process140US 6,113,797 A2000
- Method and apparatus for high efficiency reverse osmosis operation122US 5,925,255 A1999
- Membrane based fluid treatment systems110US 7,186,344 B2Water Visions International, Inc. · 2007
- Membrane-based process for the recovery of lactic acid and glycerol from a "corn thin stillage" stream104US 5,250,182 AZenon Environmental Inc. · 1993