C02F 1/444
By ultrafiltration or microfiltration
Official title: {by ultrafiltration or microfiltration}
C02F1/444 (By ultrafiltration or microfiltration) appears on 1,874 US grants and 2,758 published applications in this corpus.
Search patents in C02F- Granted patents
- 1,874
- Published applications
- 2,758
- Assignees
- 1,313
- Inventors
- 5,543
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 3 | 0 |
| 1977 | 1 | 0 |
| 1978 | 4 | 0 |
| 1979 | 2 | 0 |
| 1980 | 1 | 0 |
| 1981 | 2 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 3 | 0 |
| 1986 | 3 | 0 |
| 1987 | 3 | 0 |
| 1988 | 6 | 0 |
| 1989 | 7 | 0 |
| 1990 | 12 | 0 |
| 1991 | 12 | 0 |
| 1992 | 21 | 0 |
| 1993 | 14 | 0 |
| 1994 | 17 | 0 |
| 1995 | 20 | 0 |
| 1996 | 25 | 0 |
| 1997 | 13 | 0 |
| 1998 | 18 | 0 |
| 1999 | 25 | 0 |
| 2000 | 18 | 0 |
| 2001 | 38 | 12 |
| 2002 | 57 | 58 |
| 2003 | 48 | 89 |
| 2004 | 42 | 80 |
| 2005 | 45 | 87 |
| 2006 | 52 | 109 |
| 2007 | 46 | 76 |
| 2008 | 38 | 108 |
| 2009 | 40 | 101 |
| 2010 | 43 | 93 |
| 2011 | 57 | 109 |
| 2012 | 53 | 104 |
| 2013 | 45 | 111 |
| 2014 | 55 | 125 |
| 2015 | 53 | 123 |
| 2016 | 50 | 111 |
| 2017 | 80 | 153 |
| 2018 | 90 | 126 |
| 2019 | 103 | 141 |
| 2020 | 96 | 112 |
| 2021 | 109 | 133 |
| 2022 | 86 | 113 |
| 2023 | 76 | 141 |
| 2024 | 90 | 128 |
| 2025 | 85 | 113 |
| 2026 | 67 | 102 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Method for treating wastewater15 Sep 2026US 12,735,337 B2Mitsubishi Chemical Corporation
- Enhanced foam fractionation of oil phase from aqueous/oil mixed phase via increased viscoelasticity8 Sep 2026US 12,729,140 B2Ecolab USA Inc.
- Filter cartridge and filter having same25 Aug 2026US 12,714,954 B2Solventum Intellectual Properties Company
- Retrofitting and use of rectangular filters, assembly and method for filtration25 Aug 2026US 12,714,957 B2Filtration Technology Corporation
- Systems, Methods, and Apparatuses for Producing and Packaging Medical Fluids8 Oct 2026US 2026/0307835 A1
- Middle base for gravity-based water filter8 Oct 2026US 2026/0308023 A1Gopala AG
- Compact spiral-wound filter elements, modules and systems24 Sep 2026US 2026/0284600 A1EMD Millipore Corporation
- Integrated Method and Apparatus for Treatment of Produced Water24 Sep 2026US 2026/0285725 A1Tetra Technologies, Inc.
- Integrated Method and Apparatus for Treatment of Produced Water24 Sep 2026US 2026/0285726 A1Tetra Technologies, Inc.
Most cited
By later US patents
- Method for performing renal replacement therapy including producing sterile replacement fluid in a renal replacement therapy unit221US 6,649,063 B2NxStage Medical, Inc. · 2003
- Hemodiafiltration apparatus200US 4,702,829 AFresenius AG · 1987
- Vertical skein of hollow fiber membranes and method of maintaining clean fiber surfaces while filtering a substrate to withdraw a permeate200US 5,639,373 AZenon Environmental Inc. · 1997
- Nanofiber filter media194US 6,872,311 B2Koslow Technologies Corporation · 2005
- Method and system for producing sterile aqueous solutions193US 5,032,265 AMillipore Corporation · 1991