G01N 27/49
Systems involving the determination of the current at a single specific value
Official title: Systems involving the determination of the current at a single specific value, or small range of values, of applied voltage for producing selective measurement of one or more particular ionic species
G01N27/49 (Systems involving the determination of the current at a single specific value) appears on 189 US grants and 202 published applications in this corpus.
Search patents in G01N- Granted patents
- 189
- Published applications
- 202
- Assignees
- 191
- Inventors
- 633
- Latest grant
- 16 Jun 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 3 | 0 |
| 1979 | 0 | 0 |
| 1980 | 3 | 0 |
| 1981 | 2 | 0 |
| 1982 | 1 | 0 |
| 1983 | 0 | 0 |
| 1984 | 1 | 0 |
| 1985 | 2 | 0 |
| 1986 | 4 | 0 |
| 1987 | 0 | 0 |
| 1988 | 2 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 2 | 0 |
| 1992 | 1 | 0 |
| 1993 | 5 | 0 |
| 1994 | 6 | 0 |
| 1995 | 6 | 0 |
| 1996 | 2 | 0 |
| 1997 | 4 | 0 |
| 1998 | 5 | 0 |
| 1999 | 0 | 0 |
| 2000 | 1 | 0 |
| 2001 | 3 | 1 |
| 2002 | 1 | 2 |
| 2003 | 1 | 5 |
| 2004 | 1 | 2 |
| 2005 | 2 | 1 |
| 2006 | 2 | 3 |
| 2007 | 0 | 1 |
| 2008 | 0 | 2 |
| 2009 | 1 | 2 |
| 2010 | 1 | 1 |
| 2011 | 1 | 2 |
| 2012 | 2 | 2 |
| 2013 | 1 | 5 |
| 2014 | 4 | 6 |
| 2015 | 5 | 17 |
| 2016 | 7 | 17 |
| 2017 | 9 | 11 |
| 2018 | 10 | 25 |
| 2019 | 10 | 17 |
| 2020 | 14 | 12 |
| 2021 | 15 | 14 |
| 2022 | 16 | 26 |
| 2023 | 9 | 10 |
| 2024 | 8 | 6 |
| 2025 | 10 | 6 |
| 2026 | 5 | 6 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Portable system for determining monoethylene glycol16 Jun 2026US 12,656,314 B2Petroleo Brasileiro S.A. - Petrobras
- System, apparatus, and method for viral monitoring in effluent12 May 2026US 12,625,135 B2
- Printed graphene electrochemical phosphate sensors17 Mar 2026US 12,578,301 B2Kansas State University Research Foundation
- Electrochemical analysis of metallic depolarizers in gold electrodeposition17 Mar 2026US 12,578,302 B2ECI Technology, Inc.
- Electrochemical detection method for catalytic reaction product, electrochemical detection apparatus and transducer27 Jan 2026US 12,535,462 B2Japan Aviation Electronics Industry, Limited
- System and method for monitoring sulfite1 Oct 2026US 2026/0298871 A1Watgrid Lda.
- System, apparatus, and method for viral monitoring in effluent10 Sep 2026US 2026/0266815 A1
- Method for identifying optical isomer of low-molecular-weight compound3 Sep 2026US 2026/0259172 A1The University of Osaka
- Systems and methods for patterning and spatial electrochemical mapping of cells9 Jul 2026US 2026/0194487 A1President and Fellows of Harvard College
- Gas sensor23 Apr 2026US 2026/0110661 A1NGK Insulators, Ltd.
Most cited
By later US patents
- Potentiostatic apparatus and methods363US 5,198,771 ATransducer Research, Inc. · 1993
- Multi-electrode composition measuring device and method344US 6,416,651 B1Honeywell-Measurex Corporation · 2002
- Large amplitude sinusoidal voltammetry76US 5,650,061 AThe Regents of the University of California · 1997
- Method and apparatus for controlling the feed of water treatment chemicals using a voltammetric sensor55US 5,470,484 ABuckman Laboratories International, Inc. · 1995
- Amperimetric measurement with cell electrode deplating53US 5,059,908 ACapital Controls Company, Inc. · 1991