Thermally insulated aluminum door frame
CA 2004357 C · Owner: Tizzoni, Salvatore · Inventors: Tizzoni, Salvatore
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A frame construction for a door opening comprises an elongated aluminum extrusion which is adapted to be secured along a length of a wall defining the door opening. The aluminum extrusion includes first and second elongated spaced apart members each having an L-shaped profile and having first and second longitudinal free edges which form a channel configuration at least partly open-ended towards the door opening between the first free edges. The first sidewalls of the first and second L-shaped members are parallel to the plane of the door opening whereas the second sidewalls thereof extend towards each other at right angles from their respective first sidewalls without joining one another. …
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 December 1, 1989 and granted December 13, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 1, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 1, 2011.
- 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.