# US 12,599,322 B2 · Method for an analyte sensor cover-membrane preparation

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,599,322 B2
- Document ID: US12599322B2
- Status: Granted
- Kind: B2
- Application number: 17/519,858
- Filed: 2021-11-05
- Published: 2022-02-24
- Granted: 2026-04-14
- Earliest claimed: 2019-05-06
- Assignees: Roche Diabetes Care, Inc.
- Applicants: Roche Diabetes Care, Inc.
- Inventors: Peng Zou; Alexander Steck; Gernot Hochmuth; Reinhold Mischler; Kirill Sliozberg; Christian Hoertz
- Web page: https://patentgrep.com/patent/US12599322B2

## CPC

- A61B 5/145: Measuring characteristics of blood in vivo, e.g. gas concentration or pH-value {; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid or cerebral tissue} (non-radiation detecting or locating of foreign bodies in blood A61B5/06)
- A61B 5/14865: {invasive, e.g. introduced into the body by a catheter or needle or using implanted sensors}
- C12Q 1/002: {Electrode membranes}
- A61B 2562/02: Details of sensors specially adapted for in-vivo measurements
- A61B 2562/125: characterised by the manufacture of electrodes
- A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D)
- C12Q: MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS (immunoassay G01N33/53); COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES

## Abstract

This disclosure relates to a process for forming a membrane on an analyte sensor and further relates to an analyte sensor obtainable by this process. This disclosure also relates to a process for forming a sensing layer on an electrode of an analyte sensor and to an analyte sensor having the sensing layer obtainable by the inventive process as well as the membrane obtainable by the inventive process. The analyte sensors obtainable by the inventive processes may be used for conducting an analyte measurement of a body fluid of a user or a patient. This disclosure may be applied in the field of home care as well as in the field of professional care, such as in hospitals. Other applications are generally feasible.

## Claims

### Claim 1

A process for forming a membrane on an analyte sensor, comprising:
a) providing the analyte sensor;
b) providing a polymer solution which comprises (i) a first polymer that is hydrophobic and has a first cross-linkable group, (ii) a second polymer that is hydrophilic and has a second cross-linkable group, and (iii) a first solvent;
c) contacting the analyte sensor provided in step a) with the polymer solution provided in step b) to obtain an analyte sensor which is coated with the polymer solution;
d) drying the analyte sensor obtained in step c) to obtain a dried analyte sensor which is coated with a polymer blend which comprises the first polymer and the second polymer; and
e) curing the polymer blend which coats the dried analyte sensor obtained in step d), whereby the first polymer and the second polymer are cross-linked to form the membrane on the analyte sensor, wherein the first cross-linkable group and the second cross-linkable group are independently of one another selected from the group consisting of benzophenone groups, azide groups, anthrachinone groups, and psoralen; and
f) wherein the second polymer is different from the first polymer.

### Claim 2 (depends on 1)

The process according to claim 1, wherein the curing in step e) comprises at least one of heating the polymer blend and exposing the polymer blend to light.

### Claim 3 (depends on 1)

The process according to claim 1, wherein the first solvent is selected from the group consisting of water, methanol, ethanol, tetrahydrofurane, and dimethyl carbonate.

### Claim 4 (depends on 1)

The process according to claim 1, wherein the first polymer is a homopolymer.

### Claim 5 (depends on 1)

The process according to claim 1, wherein the second polymer is a homopolymer.