B01D 2311/18
Ph control
Official title: pH control
B01D2311/18 (Ph control) appears on 156 US grants and 249 published applications in this corpus.
Search patents in B01D- Granted patents
- 156
- Published applications
- 249
- Assignees
- 179
- Inventors
- 596
- Latest grant
- 19 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1978 | 1 | 0 |
| 1979 | 1 | 0 |
| 1980 | 1 | 0 |
| 1981 | 1 | 0 |
| 1982 | 2 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 1 | 0 |
| 1987 | 4 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 1 | 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 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 0 |
| 2005 | 0 | 3 |
| 2006 | 1 | 1 |
| 2007 | 1 | 0 |
| 2008 | 2 | 1 |
| 2009 | 1 | 5 |
| 2010 | 0 | 2 |
| 2011 | 1 | 3 |
| 2012 | 3 | 9 |
| 2013 | 4 | 15 |
| 2014 | 4 | 6 |
| 2015 | 6 | 12 |
| 2016 | 7 | 12 |
| 2017 | 6 | 15 |
| 2018 | 12 | 16 |
| 2019 | 7 | 12 |
| 2020 | 12 | 24 |
| 2021 | 13 | 20 |
| 2022 | 15 | 23 |
| 2023 | 10 | 18 |
| 2024 | 11 | 25 |
| 2025 | 17 | 20 |
| 2026 | 8 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Electrohydromodulating process for recovering nutrients, mineralizing organics, and inactivating pathogens in wastewater19 May 2026US 12,630,452 B2University of Miami
- Production method and production device for water for pure water, and production method and production system for pure water21 Apr 2026US 12,606,475 B2Nomura Micro Science Co., Ltd.
- Apparatus for producing acidic aqueous solution and method for producing acidic aqueous solution14 Apr 2026US 12,600,649 B2De Nora Permelec Ltd
- Concentration of sulfuric acid17 Mar 2026US 12,577,104 B2Dupont Safety & Construction, Inc.
- Method of purifying a protein from fermentation solids under desorbing conditions17 Mar 2026US 12,577,525 B2BASF SE
- Method for recovering alkali metal salt and apparatus for recovering alkali metal salt1 Oct 2026US 2026/0295533 A1Toray Industries, Inc.
- Method of recovering acetic acid from fermentation broth or fermentation waste liquor and reusing the same27 Aug 2026US 2026/0250725 A1Cj Cheiljedang Corporation
- Preparation methods for a highly concentrated pd1 antibody solution by applying single-pass tangential flow filtration (sptff)18 Jun 2026US 2026/0167667 A1BeOne Medicines I GmbH
- Multi-stage reverse osmosis membrane treatment system11 Jun 2026US 2026/0158446 A1Kurita Water Industries Ltd.
- Lithium recovery through reversible fatty acid precipitation11 Jun 2026US 2026/0159404 A1Uchicago Argonne, LLC
Most cited
By later US patents
- Fractionation of protein mixtures51US 4,322,275 AIonics, Incorporated · 1982
- Separation of water-soluble organic electrolytes37US 5,028,336 ATexaco Inc. · 1991
- Membrane processes for separation of organic acids from kraft black liquors23US 4,584,057 AThe United States of America as represented by the Secretary of Agriculture · 1986
- Method and apparatus for treatment of feedwaters by membrane separation under acidic conditions22US 7,320,756 B22008
- Controlling silica sol particle size18US 4,124,471 ADiamond Shamrock Corporation · 1978