G01N 15/12
By observing changes in resistance or impedance across apertures when traversed by
Official title: by observing changes in resistance or impedance across apertures when traversed by individual particles, e.g. by using the Coulter principle
G01N15/12 (By observing changes in resistance or impedance across apertures when traversed by) appears on 541 US grants and 464 published applications in this corpus.
Search patents in G01N- Granted patents
- 541
- Published applications
- 464
- Assignees
- 259
- Inventors
- 1,018
- Latest grant
- 22 Sep 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 26 | 0 |
| 1977 | 12 | 0 |
| 1978 | 12 | 0 |
| 1979 | 10 | 0 |
| 1980 | 8 | 0 |
| 1981 | 10 | 0 |
| 1982 | 9 | 0 |
| 1983 | 5 | 0 |
| 1984 | 10 | 0 |
| 1985 | 12 | 0 |
| 1986 | 7 | 0 |
| 1987 | 5 | 0 |
| 1988 | 12 | 0 |
| 1989 | 7 | 0 |
| 1990 | 9 | 0 |
| 1991 | 6 | 0 |
| 1992 | 7 | 0 |
| 1993 | 10 | 0 |
| 1994 | 3 | 0 |
| 1995 | 5 | 0 |
| 1996 | 8 | 0 |
| 1997 | 5 | 0 |
| 1998 | 5 | 0 |
| 1999 | 6 | 0 |
| 2000 | 10 | 0 |
| 2001 | 7 | 5 |
| 2002 | 11 | 8 |
| 2003 | 10 | 8 |
| 2004 | 7 | 7 |
| 2005 | 5 | 14 |
| 2006 | 5 | 19 |
| 2007 | 3 | 16 |
| 2008 | 13 | 18 |
| 2009 | 6 | 18 |
| 2010 | 13 | 16 |
| 2011 | 13 | 15 |
| 2012 | 17 | 18 |
| 2013 | 9 | 19 |
| 2014 | 23 | 26 |
| 2015 | 15 | 20 |
| 2016 | 18 | 26 |
| 2017 | 15 | 15 |
| 2018 | 16 | 14 |
| 2019 | 25 | 26 |
| 2020 | 15 | 21 |
| 2021 | 15 | 25 |
| 2022 | 11 | 25 |
| 2023 | 11 | 18 |
| 2024 | 18 | 29 |
| 2025 | 14 | 24 |
| 2026 | 7 | 14 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- G01N 15/131Details177
- G01N 15/13Details pertaining to apertures85
- G01N 2015/135ElectrodesIndexing code48
- G01N 15/134Devices using two or more apertures35
- G01N 2015/139Measuring the ratio of ac/dc impedancesIndexing code13
- G01N 2015/137CleaningIndexing code12
- G01N 2015/138Detecting blocking debrisIndexing code10
Recent patents
- Microfluidic device for detecting and characterizing at least one analyte, for example a cell, in a sample fluid22 Sep 2026US 12,742,720 B2Technische Universiteit Eindhoven
- Nano-coulter counter for detection of biological nanoparticles8 Sep 2026US 12,730,054 B2University of Kansas
- Systems for forming a nanopore in a lipid bilayer25 Aug 2026US 12,716,885 B2Roche Sequencing Solutions, Inc.
- Systems and methods for blockage detection in gas detectors18 Aug 2026US 12,710,348 B2Detector Electronics Buyer US, LLC
- Particle measuring apparatus and manufacturing method thereof9 Jun 2026US 12,650,373 B2Daegu Gyeongbuk Institute of Science and Technology
- System for reducing or optimizing the electrical consumption or production of fluidic equipment with at least one rotary component8 Oct 2026US 2026/0309613 A1Commissariat A L' Energie Atomique Et Aux Energies Alternatives
- Impedance-based classification of biological cells or other particles via machine learning methods17 Sep 2026US 2026/0279571 A1University of Puerto Rico
- Compositions and methods for structural and molecular characterization of extracellular particles13 Aug 2026US 2026/0235587 A1Ohio State Innovation Foundation
- Gamma-sterilizable chip, particularly for impedance flow cytometry30 Jul 2026US 2026/0219155 A1
- Systems and methods for isolating particles in solution by particle permittivity4 Jun 2026US 2026/0153424 A1Sigil Biosciences, Inc.
Most cited
By later US patents
- Method and apparatus for analyzing cells in a whole blood sample169US 6,228,652 B1Coulter International Corp. · 2001
- Multi-part differential analyzing apparatus utilizing light scatter techniques165US 5,125,737 ACoulter Electronics, Inc. · 1992
- Apparatus and method for analyzing particles143US 6,122,599 A2000
- Microfabricated AC impedance sensor137US 6,437,551 B1The Regents of the University of California · 2002
- Flow cytometry119US 4,818,103 ARatcom, Inc. · 1989