B01D 61/00
Processes of separation using semi-permeable membranes
Official title: Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor (separation of gases or vapours by diffusion B01D53/22)
B01D61/00 (Processes of separation using semi-permeable membranes) appears on 9,860 US grants and 10,820 published applications in this corpus.
Search patents in B01D- Granted patents
- 9,860
- Published applications
- 10,820
- Assignees
- 4,465
- Inventors
- 21,950
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 76 | 0 |
| 1977 | 72 | 0 |
| 1978 | 87 | 0 |
| 1979 | 66 | 0 |
| 1980 | 89 | 0 |
| 1981 | 61 | 0 |
| 1982 | 69 | 0 |
| 1983 | 59 | 0 |
| 1984 | 59 | 0 |
| 1985 | 59 | 0 |
| 1986 | 94 | 0 |
| 1987 | 114 | 0 |
| 1988 | 149 | 0 |
| 1989 | 140 | 0 |
| 1990 | 140 | 0 |
| 1991 | 162 | 0 |
| 1992 | 196 | 0 |
| 1993 | 154 | 0 |
| 1994 | 126 | 0 |
| 1995 | 139 | 0 |
| 1996 | 154 | 0 |
| 1997 | 138 | 0 |
| 1998 | 152 | 0 |
| 1999 | 170 | 0 |
| 2000 | 160 | 0 |
| 2001 | 210 | 45 |
| 2002 | 171 | 194 |
| 2003 | 155 | 252 |
| 2004 | 150 | 314 |
| 2005 | 122 | 266 |
| 2006 | 142 | 308 |
| 2007 | 140 | 256 |
| 2008 | 133 | 262 |
| 2009 | 141 | 275 |
| 2010 | 186 | 367 |
| 2011 | 208 | 352 |
| 2012 | 204 | 409 |
| 2013 | 219 | 422 |
| 2014 | 244 | 446 |
| 2015 | 286 | 514 |
| 2016 | 313 | 491 |
| 2017 | 334 | 571 |
| 2018 | 380 | 526 |
| 2019 | 449 | 542 |
| 2020 | 479 | 625 |
| 2021 | 441 | 591 |
| 2022 | 384 | 603 |
| 2023 | 389 | 622 |
| 2024 | 375 | 616 |
| 2025 | 432 | 534 |
| 2026 | 288 | 417 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 61/14Ultrafiltration3,573
- B01D 61/02Reverse osmosis3,324
- B01D 61/42Electrodialysis1,717
- B01D 61/24Dialysis1,031
- B01D 61/36Pervaporation911
- B01D 61/58Multistep processes818
- B01D 61/002Forward osmosis or direct osmosis397
- B01D 61/38Liquid-membrane separation240
All 9 subgroupsShow fewer
Recent patents
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- Hybrid system and method of waste heat utilization-based photovoltaic power generation and seawater desalination6 Oct 2026US 12,752,240 B2Xi' An Jiaotong University
- Eco-friendly membranes for separations6 Oct 2026US 12,752,241 B2Khalifa University of Science and Technology
- Preparation method for iron phosphate powder by microporous filtration and concentration and preparation device thereof6 Oct 2026US 12,753,078 B2Zhejiang Dong'ou Filtering Machinery Manufacturing Co., Ltd.
- Concentrated milk protein preparations8 Oct 2026US 2026/0305634 A150G Inc.
- Modular multiplatform system for mrna drug production8 Oct 2026US 2026/0306407 A1BioNTech SE
- Filtration manifold with integrated bypass8 Oct 2026US 2026/0307010 A1Midea Group Co., Ltd.
- Modified polyvinylidene fluoride membranes for water filtration8 Oct 2026US 2026/0307011 A1Uchicago Argonne, LLC
- Salt-rejecting continuous passive solar thermal desalination via thin-film condensation8 Oct 2026US 2026/0307012 A1The Regents of the University of California
Most cited
By later US patents
- Mesoscale polynucleotide amplification devices1,091US 5,587,128 AThe Trustees of the University of Pennsylvania · 1996
- Mesoscale polynucleotide amplification device and method1,042US 5,498,392 AThe Trustees of the University of Pennsylvania · 1996
- Melt-blown fibrous web1,019US 5,582,907 APall Corporation · 1996
- Capillary filtration and collection method for long-term monitoring of blood constituents873US 4,777,953 AAsh Medical Systems, Inc. · 1988
- Capillary filtration and collection device for long-term monitoring of blood constituents842US 4,854,322 AAsh Medical Systems, Inc. · 1989