Superficial therapeutic system comprising an antineoplastic active substance, particularly 5-fluorouracil
CA 2007353 C · Owner: Muller, Walter · Inventors: Muller, Walter; Kindel, Heinrich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a superficial therapeutic system consisting of an impermeable backing layer an active, substance containing matrix and a removable protective, layer, in which the matrix comprises: a. antineoplastic active substance, b. a self-adhesive polyacrylate c. a water absorber, and optionally, d. a non-adhesive hydrophilic polyacrylate e. a softener and/or penetration accelerator.
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 January 9, 1990 and granted August 19, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 9, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 9, 2012.
- 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.