US 2020/0003767 A1Published application

Method and system for substance detection with a magnetic sensor

AssigneeZepto Life Technology, Inc.

InventorJiaoming Qiu

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Abstract

Methods, systems and programing for substance detection with a magnetic sensor are presented. In one example, a magnetic sensor having one or more layers is formed on a base for sensing a magnetic field created by magnetic particles present in proximity to the magnetic sensor. A first end of each of a first set of strands is immobilized with respect to the magnetic sensor. A magnetic particle is attached to a second end of each of the first set of strands so that when a material containing a substance is in contact with the base, the substance causes at least some of the first set of strands to break resulting in that the magnetic particle attached to the second end of each of the at least some of the first set of strands is no longer in proximity to the magnetic sensor.

Claims7

Dependent claims

A method for detecting a level of a substance in a material, comprising:

detecting a first level of a magnetic field via a device comprising a magnetic sensor configured for sensing the magnetic field created by magnetic particles present in proximity to the magnetic sensor, wherein the device comprises a first set of strands each of which having a first end previously immobilized with respect to the magnetic sensor and a second end attached to a magnetic particle, the device further comprising a second set of strands each of the second set of strands being attached to a surface of the magnetic sensor;
and the first end of each of the first set of strands is bound to one of the second set of strands;
depositing a sample of the material onto a base of the device that causes, due to the presence of the substance, at least some of the first set of strands to break so that the magnetic particle attached to the second end of each of the at least some of the first set of strands is no longer in proximity to the magnetic sensor;
detecting a second level of the magnetic field via the device;
and
determining an amount of the substance present in the sample of the material based on the first and second levels of the magnetic field.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/455,828Filed 28 Jun 2019
Priority: 9 Jul 2014
Published: 2 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

G01N 33/5434
Magnetic particles: using magnetic particle immunoreagent carriers which constitute new materials per se
C12Q 1/68
Measuring or testing processes involving enzymes, nucleic acids or microorganisms ; Compositions therefor; Processes of preparing such…
C12Q 1/6825
Characterised by the detection means: nucleic acid detection involving sensors
G01N 33/54333
Magnetic particles: modification of conditions of immunological binding reaction, e.g. use of more than one type of particle, use of chemical…

Family

Application61/996,965Us provisional application · filed 9 Jul 2014
Application14/738,991Division · filed 15 Jun 2015
Application16/455,828Division
US 2016/0011182 A1Published application
US 2020/0003767 A1This patent

From the US filing history. Foreign family members aren’t listed.

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