B01D 3/143
By two or more of a fractionation, separation or rectification step
Official title: {by two or more of a fractionation, separation or rectification step}
B01D3/143 (By two or more of a fractionation, separation or rectification step) appears on 1,524 US grants and 1,750 published applications in this corpus.
Search patents in B01D- Granted patents
- 1,524
- Published applications
- 1,750
- Assignees
- 770
- Inventors
- 4,008
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 4 | 0 |
| 1977 | 4 | 0 |
| 1978 | 5 | 0 |
| 1979 | 10 | 0 |
| 1980 | 7 | 0 |
| 1981 | 14 | 0 |
| 1982 | 13 | 0 |
| 1983 | 9 | 0 |
| 1984 | 10 | 0 |
| 1985 | 6 | 0 |
| 1986 | 4 | 0 |
| 1987 | 4 | 0 |
| 1988 | 1 | 0 |
| 1989 | 5 | 0 |
| 1990 | 7 | 0 |
| 1991 | 2 | 0 |
| 1992 | 3 | 0 |
| 1993 | 7 | 0 |
| 1994 | 5 | 0 |
| 1995 | 9 | 0 |
| 1996 | 7 | 0 |
| 1997 | 10 | 0 |
| 1998 | 16 | 0 |
| 1999 | 10 | 0 |
| 2000 | 11 | 0 |
| 2001 | 22 | 8 |
| 2002 | 13 | 3 |
| 2003 | 12 | 13 |
| 2004 | 8 | 29 |
| 2005 | 11 | 19 |
| 2006 | 9 | 19 |
| 2007 | 19 | 22 |
| 2008 | 13 | 36 |
| 2009 | 17 | 34 |
| 2010 | 15 | 34 |
| 2011 | 28 | 35 |
| 2012 | 24 | 46 |
| 2013 | 39 | 47 |
| 2014 | 34 | 44 |
| 2015 | 46 | 74 |
| 2016 | 52 | 85 |
| 2017 | 49 | 90 |
| 2018 | 93 | 120 |
| 2019 | 140 | 136 |
| 2020 | 137 | 139 |
| 2021 | 122 | 151 |
| 2022 | 101 | 152 |
| 2023 | 109 | 119 |
| 2024 | 95 | 122 |
| 2025 | 83 | 112 |
| 2026 | 50 | 61 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
Recent patents
- Methods of dewatering of alcoholic solutions via forward osmosis and related systems6 Oct 2026US 12,752,239 B2Porifera, Inc.
- Dual reactor system for simultaneous decontamination and cracking of plastic derived oil to circular chemicals22 Sep 2026US 12,742,125 B2Saudi Arabian Oil Company
- Dehydrogenation and pyrolysis product recovery with heat integration8 Sep 2026US 12,728,378 B2Uop LLC
- Method for purifying a feedstock resulting from a method for depolymerizing styrene compounds11 Aug 2026US 12,703,670 B2Compagnie Generale Des Etablissements Michelin
- Alkylated cyclodextrin compositions and processes for preparing and using the same4 Aug 2026US 12,698,348 B2CyDex Pharmaceuticals, Inc.
- Systems and methods for using facilitated transport membranes to separate olefins and paraffins8 Oct 2026US 2026/0308087 A1
- A method and plant for purifying ethylene carbonate8 Oct 2026US 2026/0308137 A1Sulzer Management AG
- A method and plant for purifying ethylene carbonate8 Oct 2026US 2026/0308138 A1Sulzer Management AG
- Method for producing bioethanol and device for producing bioethanol8 Oct 2026US 2026/0308643 A1ARKHE Co., Ltd.
- Absorption liquid for capturing carbon dioxide and use thereof, and method for capturing carbon dioxide1 Oct 2026US 2026/0295511 A1China Petroleum & Chemical Corporation
Most cited
By later US patents
- Methods for recovering acrylic acid353US 6,252,110 B1Nippon Shokubai Co., Ltd. · 2001
- Distillation process for ethanol209US 5,124,004 ATrustees of Dartmouth College · 1992
- Apparatus for producing ethanol161US 4,678,543 AHuftung Fried Krupp Gesellschaft mit beschrankter · 1987
- Process for producing ethanol161US 4,692,218 AFried. Krupp Gesellschaft mit beschrankter Haftung · 1987
- Method of purifying eicosapentaenoic acid or the ester derivative thereof by fractional distillation156US 5,215,630 AKansai Chemical Engineering Co., Ltd. · 1993