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:
Mar. 19, 1991
Filed:
Aug. 25, 1989
Applicant:
Inventors:
Surendra Sangekar, Union, NJ (US);
Winston A Vadino, Whitehouse Station, NJ (US);
Eugenio A Cefali, Plantation, FL (US);
Assignee:
Schering Corporation, Kenilworth, NJ (US);
Primary Examiner:
Int. Cl.
CPC ...
A61K / ;
U.S. Cl.
CPC ...
424482 ; 424475 ; 424480 ;
Abstract
A long acting diltiazem formulation is disclosed that comprises more than 35 percent by weight of a swellable hydrophilic polymer. Release rate is also controlled by the application of diffusion controlled membrane to the matrix tablet containing swellable hydrophilic polymers. The diffusion rate through the membrane depends upon the composition or ratio of hydrophilic to hydrophobic coating agent.