Cardboard spacer/seal as thermal insulator
CA 2117809 C · Owner: Taylor, Donald Morey · Inventors: Taylor, Donald Morey
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-paned insulated light, such as a window incorporates an, interior panel spacer/seal that includes a thermal insulating layer of cardboard. The cardboard serves as a low cost insulating layer and may be used in conjunction with rolled or extruded metal spacer forms so as to vastly, diminish the thermal bridging effect normally present with such metallic sections. The cardboard spacer can be used adjoining either the "cold" pane or the "hot" pane of the multi-paned unit or may be interposed between, adjacent metallic sections as a thermal break therebetween. The cardboard is preferably sealed with a surface sealing layer such as polyvinyl alcohol to, effectively preclude gas …
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 October 11, 1994 and granted February 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2016.
- 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.