Window insulator
CA 2069986 A1 · Owner: Johnson, Brenis E. · Inventors: Johnson, Brenis E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A window insulator comprising an insulator core of lightweight rigid insulating materials and/or flexible foam materials, the flexible from materials being employed at least around the periphery of the core, enclosed by a cover for placement in a window for blocking the entry of sunlight into the interior portion of the structure for reducing the level of sound energy passing through the window, and for substantially preventing or reducing the transfer of heat through the window. The insulator core may comprise a one-piece body of lightweight relatively rigid but, slightly hand-compressible insulating material. Alternatively the core may comprise flexible, foam material. Alternatively the …
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 May 29, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 29, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 29, 2014.
- 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.