Frame for a wall opening and methods of assembly and use
CA 2255256 C · Owner: Anderson, Bruce · Inventors: Anderson, Audrey E.; Anderson, Justin J.; Anderson, Thayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A frame is formed of side walls that are extruded from vinyl. The side walls have interior channels. The side walls may be formed to effect a female-male connection between the ends of two adjoining side walls. Alternatively a locking member is provided that is sized to frictionally engage a selected channel. The side walls have a concrete retention fin positioned to extend away from the outer wall of the side wall to interconnect with the concrete as the and after the concrete cures. The frame may be formed into door jambs doors, and the like. The frame may also be a window buck that may be formed into selected geometric shapes. Window bucks of different dimensions may be assembled on site …
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 4, 1998 and granted November 19, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 2020.
- 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.