Foam seal frame corner joint and method of manufacture
CA 2645593 C · Owner: Milgard Manufacturing Incorporated · Inventors: Chiang, Cliff; Klein, John J.; Sironko, Phil
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A frame comer joint includes first and second frame rails (24 26 or 26a or 26b or 26c or 26d) having hollow interiors of predetermined contours and ends in mitered abutment. A corner key (32 or 32a or 32b or 32c or 32dl 32d2) has legs inserted into the mitered ends of the frame rails. End portions of the legs substantially fill the hollow interiors of the frame rails forming a substantially closed cavity (58) within the frame rails and between the end portions of the corner key legs. Solidified resin foam (38) is disposed within this cavity rigidifying the corner joint while the remainder of the interiors of the frame rails preferably is substantially free of solidified foam. At least one …
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 22, 2006 and granted June 18, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 22, 2026.
- 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.