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:
May. 22, 2007
Filed:
Jan. 26, 2001
Takashi Ishibashi, Sakai, JP;
Kengo Ikegami, Nishinomiya, JP;
Keigo Nagao, Kawanishi, JP;
Hiroyuki Yoshino, Suita, JP;
Masakazu Mizobe, Takatsuki, JP;
Takashi Ishibashi, Sakai, JP;
Kengo Ikegami, Nishinomiya, JP;
Keigo Nagao, Kawanishi, JP;
Hiroyuki Yoshino, Suita, JP;
Masakazu Mizobe, Takatsuki, JP;
Tanabe Seiyaku Co., Ltd., Osaka, JP;
Abstract
The present invention is to provide a sustained release preparation comprising a drug-containing core substance and a multilayered coating layer covering the core substance, wherein all adjacent layers in the multilayered coating layer contain mutually different hydrophobic organic compound-water-soluble polymer mixtures; and, a method of producing a sustained release preparation, having a multilayered coating layer in which adjacent layers contain different hydrophobic organic compound-water-soluble polymer mixtures, which comprises spray-coating a solution containing a hydrophobic organic compound-water-soluble polymer mixture onto a drug-containing core substance, continuing to spray-coat a solution containing a different hydrophobic organic compound-water-soluble polymer mixture onto the resulting coating layer, and repeating this step.