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.:
Date of Patent:
Jun. 02, 2020
Filed:
Apr. 16, 2015
Seed Co., Ltd., Tokyo, JP;
Senju Pharmaceutical Co., Ltd., Osaka-shi, Osaka, JP;
Haruka Obata, Tokyo, JP;
Kiyoshi Shoji, Tokyo, JP;
Yoshiko Yamazaki, Tokyo, JP;
Toru Matsunaga, Tokyo, JP;
Takao Sato, Tokyo, JP;
Wakiko Asayama, Kobe, JP;
Shinichi Yasueda, Kobe, JP;
SEED CO., LTD., Tokyo, JP;
SENJU PHARMACEUTICAL CO., LTD., Osaka-Shi, JP;
Abstract
The purpose of the present invention is to provide a polymer gel that can increase drug content ratio and reduce undesirable influence on gel strength and shape stability after the drug release, compared with the conventional techniques. The purpose can be achieved by an anionic drug-containing medical device comprising: (1) an anionic drug; and (2) a copolymer which contains, as constituents, a cationic monomer comprising a condensation product of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth)acrylic acid or a salt of the condensation product and a monomer capable of copolymerizing with the condensation product or the salt of the condensation product.