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:
Nov. 02, 1993
Filed:
May. 18, 1992
Tadayoshi Ohmura, Shizuoka, JP;
Muneo Fukui, Shizuoka, JP;
Hiroshi Sugiura, Shizuoka, JP;
Satoru Yoneya, Shizuoka, JP;
Toshiharu Hosono, Shizuoka, JP;
Atsushi Kajiyama, Saitama, JP;
Yamanouchi Pharmaceutical Co., Ltd., Tokyo, JP;
Abstract
A coating material for controlling drug release, useful for long acting formulations--e.g. for once-a-day administration, and to a long acting granular composition comprising a drug (especially one conventionally difficult to prepare in long acting form) coated with the coating material. This composition may be mixed with other granular drug formulations. The drug-release controlling coating material comprising, in a specific ratio, one specific water-insoluble and low water-permeability polymers and two materials differing from each other in the pH-dependency of their solubility (pH-dependent polymer-materials).