Transdermal release system for pharmaceutical preparations
CA 1136045 A · Owner: Boehringer Ingelheim G.M.B.H. · Inventors: Stricker, Herbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a pharmaceutical preparation for transdermal application, which comprises a film comprising a skin-compatible polyacrylate, which swells in water and a pharmaceutically active substance in amorphous form. The invention is also directed to the preparation of said pharmaceutical preparation and its use in administering pharmaceutically active substances.
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
- Granted November 23, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 23, 1999.
- 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.