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. 30, 1999
Filed:
Sep. 18, 1996
Applicant:
Inventors:
Assignee:
Shiseido Company, Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424489 ; 424490 ; 424468 ; 424457 ;
Abstract
Microspheres prepared by emulsifying an aqueous phase containing a drug and an oil phase containing a biodegradable polymer to form a W/O emulsion, and then mixing and agitating this emulsion with another aqueous phase constituting a continuous phase to form a W/O/W emulsion. These microspheres can release a major portion of the drug after a predetermined period of time has elapsed after their administration to the patient, and are especially suitable for intracerebral implantation.