Plate-shaped roofing element
CA 1072286 A · Owner: A/S Hotaco · Inventors: Harder, Sven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roofing element is disclosed of the type essentially consisting of adhesive foam plastic whose upwardly facing surface is provided with a covering plate. It has been difficult with the heretofore known roofing elements of this type to obtain an adequate stability to changing moisture and temperatures and the consequent variations in pressure under the roofing felt. The invention provides a roofing element obviating these drawbacks and being mechanically solid, and this is achieved according to the invention by making the roofing element so that the covering plate is composed of a bituminous roofing felt, whose surface facing the element is covered with gravel or pebbles, and providing a …
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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
- Granted February 26, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 26, 1997.
- 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.