Method and apparatus for forming a transdermal drug device
CA 2109099 C · Owner: Sablotsky,Steven · Inventors: Sablotsky,Steven; Laprade, Ronald E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method and apparatus for forming a transdermal drug delivery device from a multilayer web (1) comprised of a backing layer (16), a drug-containing pressure sensitive adhesive layer (14), and a release layer (12) or liner in which cutting is progressively achieved along a line coplanar with the axes of a cutting roller (86) and anvil roller (92) counter-rotating in proximity to each other. Cutting is achieved completely through the web (10) about the periphery of the transdermal drug delivery device while simultaneously achieving a scoring only of the release liner (12) without penetration of the pressure sensitive adhesive layer (14) or backing layer (16).
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 April 24, 1992 and granted February 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 24, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 24, 2014.
- 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.