B01D 2311/02
Specific process operations before starting the membrane separation process
B01D2311/02 (Specific process operations before starting the membrane separation process) appears on 91 US grants and 93 published applications in this corpus.
Search patents in B01D- Granted patents
- 91
- Published applications
- 93
- Assignees
- 95
- Inventors
- 264
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 0 | 0 |
| 1979 | 3 | 0 |
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 3 | 0 |
| 1983 | 2 | 0 |
| 1984 | 5 | 0 |
| 1985 | 2 | 0 |
| 1986 | 2 | 0 |
| 1987 | 1 | 0 |
| 1988 | 3 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 0 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 0 |
| 2006 | 0 | 0 |
| 2007 | 0 | 0 |
| 2008 | 0 | 2 |
| 2009 | 0 | 1 |
| 2010 | 1 | 4 |
| 2011 | 3 | 1 |
| 2012 | 2 | 1 |
| 2013 | 1 | 1 |
| 2014 | 0 | 2 |
| 2015 | 3 | 5 |
| 2016 | 2 | 7 |
| 2017 | 12 | 8 |
| 2018 | 4 | 6 |
| 2019 | 5 | 7 |
| 2020 | 6 | 10 |
| 2021 | 6 | 10 |
| 2022 | 3 | 7 |
| 2023 | 3 | 5 |
| 2024 | 4 | 8 |
| 2025 | 6 | 6 |
| 2026 | 7 | 2 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Separation methods and systems13 Aug 2026US 2026/0233170 A1Altr Fltr Inc.
- Method for producing ethanol from lignocellulosic raw material23 Jul 2026US 2026/0209806 A1Eneos Corporation
- Butanol production method11 Dec 2025US 2025/0376704 A1Nippon Shokubai Co., Ltd.
- Transient operation method for separation device13 Nov 2025US 2025/0345749 A1NGK Insulators, Ltd.
- Method for recovering lithium from waste lithium ion batteries3 Jul 2025US 2025/0219177 A1Asaka Riken Co., Ltd.
Most cited
By later US patents
- Deaerating liquid164US 4,371,385 ACobe Laboratories, Inc. · 1983
- Continuous process for the reclamation of waste drilling fluids141US 4,482,459 ANewpark Waste Treatment Systems Inc. · 1984
- Apparatus for preparation of infusion grade water72US 4,495,067 ATracor, Inc. · 1985
- Process and apparatus for recovering usable water and other materials from oil field mud/waste pits69US 4,366,063 ARomec Environmental Research & Development, Inc. · 1982
- Process for sterilization and removal of inorganic salts from a water stream61US 4,392,959 A1983