Delayed-release form for pharmaceutical active compounds
CA 2103487 C · Owner: Flaig, Ernst · Inventors: Spengler, Reinhard; Hibst, Hartmut; Harth, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel delayed-release form for pharmaceutical active compounds, characterized by a core containing the active compound and a diffusioninhibiting, adhesive coating layer having a thickness in the range from 0.01 to 10 µm, consisting of a chemical network which has been applied to the support in a plasma-assisted chemical deposition process and a, process for its production are described.
Read the whole patent
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
- Filed November 19, 1993 and granted October 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2015.
- 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.