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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 12482828 B1

PDFFull Text
Date of Patent:
Nov. 25, 2025

Filed:

May. 16, 2024

Method for preparing a cathode of a secondary battery and a purified n-methyl pyrrolidone, and purifying a waste n-methyl pyrrolidone using an inhibitor

Applicant:

Jaewon Industrial Co., Ltd, Jeollanam-do, KR;

Inventors:

Jae Won Shim, Jeollanam-do, KR;

Sung Won Shim, Jeollanam-do, KR;

Byung Ki Son, Daejeon, KR;

Hwan Choi, Jeollanam-do, KR;

Youn Soo Shin, Jeollanam-do, KR;

Tae Gi Choi, Jeollanam-do, KR;

Hwa Yeong Choi, Jeollanam-do, KR;

Yeong Su Choo, Jeollanam-do, KR;

Assignee:

JAEWON INDUSTRIAL CO., LTD, Jeollanam-Do, KR;

Attorney:

The PL Law Group, PLLC

Primary Examiner:

Austin Murata

Int. Cl.
CPC ...
H01M 4/62 (2006.01); B01D 3/34 (2006.01); C07D 207/267 (2006.01); H01M 4/04 (2006.01); H01M 4/139 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/628 (2013.01); B01D 3/34 (2013.01); C07D 207/267 (2013.01); H01M 4/0404 (2013.01); H01M 4/139 (2013.01); H01M 2004/028 (2013.01);
Abstract

In a method for preparing a cathode of a secondary battery, a method for preparing a purified N-methyl pyrrolidinone (NMP), and a method for purifying a waste NMP, an inhibitor is added to prevent NMP from being decomposed to produce formaldehyde during the process. 1. The inhibitor may be a phenol-based antioxidant and/or an amine-based light stabilizer.

Find Patent Forward Citations

Shim, Jae. (2025). Method for preparing a cathode of a secondary battery and a purified n-methyl pyrrolidone, and purifying a waste n-methyl pyrrolidone using an inhibitor (U.S. Patent No. 12482828). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12482828

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

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