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:
Aug. 06, 1996
Filed:
Sep. 29, 1994
Applicant:
Inventors:
Guohua Zhang, Parsippany, NJ (US);
Prasad Pinnamaraju, Edison, NJ (US);
Assignee:
Hallmark Pharmaceutical, Inc., Somerset, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
264115 ; 264117 ; 264122 ; 424470 ;
Abstract
The subject invention is a process to manufacture a sustained release pharmaceutical tablet. The process includes granulation of inactive ingredients, such as hydroxypropyl cellulose, with active ingredients, such as nifedipine; followed by micronization of the granules. Additional granulation of further active or inactive ingredients is done with or without the micronized granules formed in the first step. All of the granules are then dried if necessary, lubricated, and compressed into tablets which slowly release the active ingredient over a controlled length of time.