Process and apparatus for the production of a sandwich sheet
CA 2563446 C · Owner: Lombardini, Francesco · Inventors: Lombardini, Francesco
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for the production of a blister sheet which comprises the following steps: a) extrusion (1) of a bottom film (7) a central film (8), a top film , (7) starting from the corresponding granule; b) thermoforming (3) of the central film; c) calibration and partial cooling (5) of the bottom and top films; d) heating of at least one side of the bottom and top films and coupling of the two bottom and top films with the thermoformed film.
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 25, 2005 and granted January 22, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.