Divisible tablet with delayed release of active substance and process for the production thereof
CA 1232202 A · Owner: Boehringer Ingelheim International Gmbh · Inventors: Zierenberg, Bernd; Gupte, Arun R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a divisible polyacrylate-based tablet with delayed release of the active substance which consists of a pressed blank of finely divided polyacrylate material with conventional tablet-making excipients and the active substance incorporated as a molecular dispersion in the polymer. In order to produce the divisible tablet, the pharmaceutical active substance together with the polyacrylate is dissolved in an organic solvent, the solvent is evaporated off the solid active substance-, containing polyacrylate is ground at a temperature below the glass temperature, the active substance-containing polyacrylate powder is processed with conventional tablet-making excipients …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted February 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2005.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.