B01D 2323/48
Influencing the ph
Official title: Influencing the pH
B01D2323/48 (Influencing the ph) appears on 34 US grants and 58 published applications in this corpus.
Search patents in B01D- Granted patents
- 34
- Published applications
- 58
- Assignees
- 52
- Inventors
- 186
- Latest grant
- 10 Feb 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1988 | 1 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 1 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 1 | 0 |
| 2000 | 1 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 1 |
| 2003 | 0 | 0 |
| 2004 | 0 | 1 |
| 2005 | 0 | 0 |
| 2006 | 1 | 2 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 0 | 3 |
| 2010 | 3 | 2 |
| 2011 | 0 | 0 |
| 2012 | 0 | 0 |
| 2013 | 1 | 5 |
| 2014 | 0 | 1 |
| 2015 | 2 | 1 |
| 2016 | 0 | 2 |
| 2017 | 3 | 4 |
| 2018 | 3 | 3 |
| 2019 | 0 | 1 |
| 2020 | 1 | 6 |
| 2021 | 3 | 1 |
| 2022 | 2 | 4 |
| 2023 | 2 | 4 |
| 2024 | 1 | 8 |
| 2025 | 5 | 2 |
| 2026 | 2 | 4 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
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- Zeolite membrane complex, separation apparatus, separation method and method of producing zeolite membrane complex20 May 2025US 12,303,842 B2NGK Insulators, Ltd.
- High-flux silicon carbide ceramic filter membrane and preparation method thereof11 Feb 2025US 12,220,668 B2Nanjing Hanssen Material Technology Co., Ltd.
- Filtration apparatus comprising polymer modified graphene oxide membranes18 Jun 2026US 2026/0166496 A1
- Method of Preparing Polyamide Membrane with Multi-Level Pore Structure Mediated by Protein Fiber Network19 Feb 2026US 2026/0048364 A1Harbin Institute of Technology
- Water treatment method15 Jan 2026US 2026/0014526 A1King Fahd University of Petroleum and Minerals
- Method for making polysulfone-based membrane8 Jan 2026US 2026/0008016 A1King Fahd University of Petroleum and Minerals
- Highly Tuneable Graphene Oxide Membranes for Point-of-use to Portable Water Filtration20 Nov 2025US 2025/0352956 A1The University of Manchester
Most cited
By later US patents
- High flux membrane67US 4,749,487 ASyrinx Research Pty. Ltd. · 1988
- Porous amorphous silica-alumina refractory oxides, their preparation and use as separation membranes19US 5,871,646 ABritish Gas Corporation · 1999
- Method of creating silica ceramic membranes18US 5,194,200 AWisconsin Alumni Research Foundation · 1993
- Method for improving filter efficiency16US 5,308,494 AE. I. Du Pont de Nemours and Company · 1994
- Porous amorphous silica-alumina refractory oxides, their preparation and use as separation membranes3US 6,042,727 ABritish Gas Corporation · 2000