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. 24, 1990
Filed:
Oct. 04, 1989
Applicant:
Inventors:
Claire J Lovegrove, Ware, GB;
David A Rawlins, Tewin, GB;
Anthony J Phillips, Little Hadham, GB;
David A Tainsh, Buntingford, GB;
Assignee:
Merck Sharp & Dohme Ltd., Hoddesdon, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61K / ; A61K / ;
U.S. Cl.
CPC ...
424480 ; 424482 ; 424473 ; 424494 ; 424495 ; 424497 ;
Abstract
Oral dosage forms for neutral, zwitterions or slats of acidic or basic drugs with approximate zero order release kinetics comprise a core matrix of the drug, and a gelling polymer, the matrix being coated with a water permeable but insoluble polymer.