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, 1982
Filed:
Jun. 15, 1981
Herbert Stricker, Ingelheim, DE;
Bernhard Freund, Gau-Algesheim, DE;
Heribert Harwalik, Ingelheim, DE;
Karl L Rominger, Ingelheim, DE;
Siegfried Darda, Ingelheim, DE;
Volkmar Haselbarth, Ingelheim, DE;
Dietrich Arndts, Appenheim, DE;
Wolf D Bechtel, Appenheim, DE;
Gerhard Bozler, Biberach, DE;
Rolf Brickl, Biberach, DE;
Peter Gruber, Biberach, DE;
Boehringer Ingelheim GmbH, Ingelheim am Rhein, DE;
Abstract
A pharmaceutical dosage unit retard form having a constant, pH-independent release rate of active ingredient, consisting of a core comprising an active ingredient, and a semi-permeable diffusion coating over the core, were the coating consists of a water-insoluble film-former, a water-soluble polymer and eventually an acid-insoluble polymer incorporated therein.