Improved method for manufacturing freeze dried dosages in a multilaminate blister pack
CA 2129254 C · Owner: Kearney, Patrick · Inventors: Thompson, Andrew Roy; Kearney, Patrick; Yarwood, Richard John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved method for manufacturing freeze dried pharmaceutical tablets in blister packs is disclosed. Liquid dosages are introduced into a multilayer laminated buster sheet having an impermeable intermediate layer (14) that is positioned between first and second outer layers (16, 18) each of which has substantially the same coefficient of thermal expansion. The properties of the outer layers of the blister sheet are such that there are no inter-layer stresses that will cause curvature of the buster sheet when it is subjected to temperature changes during the freezing and freeze drying sips. Following the introduction of the dosages into the depressions (10) of the blister sheet the, …
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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 30, 1993 and granted November 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 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.