Plaster with a high content of softening ingredients
CA 2045290 C · Owner: Lts Lohmann Therapie-Systeme Gmbh & Co. Kg · Inventors: Teubner, Andreas; Muller, Walter; Minderop, Raphaela
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 device for the topical and systemic administration of active substances to or through the skin consisting of a backing layer at least one self-adhesive layer, and a removable protective layer, wherein the self-adhesive layer consists of, (a) 100 parts by weight of a polyacrylate adhesive, (b) 5 to-150, preferably 10 to 100 and in par-, ticular 15 to 50 parts by weight of a film former compatible with polyacrylates, (c) 0 to 250 parts by weight of a non-softening active substance and/or adjuvant, and, (d) 10 to 250 parts by weight of a softening active substance and/or adjuvant.
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 June 24, 1991 and granted February 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 24, 2013.
- 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.