Insulated roofing system
CA 2315514 C · Owner: Cox, Stanley Alfred · Inventors: Cox, Stanley Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an insulated roofing system comprising a closed cell foamed in place insulation applied over the roof deck or existing substrate. In the preferred embodiment the foamed in place insulation is selected from foamed synthetic resins made of polystyrene polyethylene, acrylic resin, phenol resin urea resin, epoxy resin, diallylphthalate resin urethane resin and the like. The preferred foamed in place insulation is a urethane foam. A rubber membrane is fully adhered over the insulation by an adhesive. The rubber membrane is selected from natural or synthetic rubbers such as styrene-butadiene rubber acrylonitrile-butadiene rubber, chloroprene rubber butadiene …
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 8, 2000 and granted May 28, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 8, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 8, 2022.
- 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.