Double skin door apparatus
CA 2496276 C · Owner: Masonite International Corporation · Inventors: Crittenden, Jerry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hollow core door comprises a perimeter frame and first and second molded, skins. Each skin has an exterior surface and an interior surface secured to opposing sides, of the frame. At least one of the skins has an outer planar area an inner , planar area, and, an asymmetric profile surrounding the inner planar area and interconnecting and integral, with the outer planar area and the inner planar area. The asymmetric profile area has a, convex portion extending outwardly from and relative to the plane of the outer planar, area.
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 August 20, 2003 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 20, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 20, 2025.
- 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.