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:
Feb. 24, 2004
Filed:
May. 31, 2001
Applicant:
Inventors:
Yoshio Hata, Toyonaka, JP;
Hikaru Taira, Ikeda, JP;
Jun Sato, Kawanishi, JP;
Satoshi Iinuma, Kobe, JP;
Assignee:
Takeda Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61K 4/730 ; C08G 2/30 ;
U.S. Cl.
CPC ...
A61K 4/730 ; C08G 2/30 ;
Abstract
A sustained-release preparation comprising a bioactive substance having an acidic group and a biodegradable polymer having an optionally protected basic group which improves the rate of incorporation of the bioactive substance, suppresses its leakage early after adminstration, and exhibits constantly suppressed release for an extended period of time.