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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12667099 B1

PDFFull Text
Date of Patent:
Jun. 30, 2026

Filed:

Mar. 30, 2021

Cell preservation method

Applicant:

Cell Exosome Therapeutics Inc., Tokyo, JP;

Inventors:

Yasutomo Yanagita, Tokyo, JP;

Chugo Rinoie, Tokyo, JP;

Takefumi Ishidao, Tokyo, JP;

Itsunari Minami, Tokyo, JP;

Assignee:

Cell Exosome Therapeutics Inc., Tokyo, JP;

Attorney:

Clark & Elbing LLP

Primary Examiner:

Tracy Vivlemore

Assistant Examiner:

Fatimah Khalaf Matalkah

Int. Cl.
CPC ...
A01N 1/02 (2006.01); A01N 1/125 (2025.01); A01N 1/142 (2025.01); A01N 1/162 (2025.01); A61K 9/08 (2006.01); A61K 35/28 (2015.01); A61K 47/10 (2017.01); A61K 47/20 (2006.01); C12N 5/0775 (2010.01);
U.S. Cl.
CPC ...
A01N 1/162 (2025.01); A01N 1/125 (2025.01); A01N 1/142 (2025.01); A61K 9/08 (2013.01); A61K 35/28 (2013.01); A61K 47/10 (2013.01); A61K 47/20 (2013.01); C12N 5/0663 (2013.01); C12N 2500/35 (2013.01); C12N 2500/62 (2013.01);
Abstract

The purpose of the present invention is to obtain a cell suspension with a low concentration of cryoprotectant. This method of preserving cells used comprises the steps of (a) enriching cells from a cell suspension containing the cells and a cryoprotective solution to generate an enriched fraction, and (b) freezing the enriched fraction to prepare a frozen material. It is also possible to use a method of producing a cell suspension, comprising the steps of (a) enriching cells from a cell suspension containing the cells and a cryoprotective solution to generate an enriched fraction, (b) freezing the enriched fraction to prepare a frozen material, (c) thawing the frozen material to prepare a thawed material, and (d) mixing the thawed material and a solution to produce a cell suspension.

Find Patent Forward Citations

Yanagita, Yasutomo. (2026). Cell preservation method (U.S. Patent No. 12667099). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12667099

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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