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:
Apr. 16, 2002
Filed:
Jun. 21, 2000
Applicant:
Inventors:
Olivier Saslawski, Haquenau, FR;
Laurence Orlando, Decines, FR;
Assignee:
Merck Patent Gesellschaft, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
A61K 9/24 ; A61K 9/26 ;
U.S. Cl.
CPC ...
A61K 9/24 ; A61K 9/26 ;
Abstract
A multi-layer tablet for the instant and prolonged release of active substances comprises at least two layers where the first outer layer comprises a mixture of excipients and an active substance, allowing for the immediate release of the active substance within the first layer, and a second layer, arranged in contact with the first layer. The second layer comprises a nonbiodegradable inert porous polymeric matrix in which an active substance is dispersed, allowing for the prolonged release of the active substance within the second layer.