Metal roof sealing system and method
CA 2264800 A1 · Owner: Kane, Edward G. · Inventors: Letts, John B.; Kane, Edward G.; Williamson, Robert B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealing system and method for a metal roof (1) having a plurality of sheet metal panels (4) attached to a roof deck (2) covered by a layer of insulation (17), such as polystyrene. The joints and seams (10) formed at junctions of adjacent panels are sealed with a non-flammable or low combustible char , forming, non-absorbent layer of material (20 23) which is applied over the , seams in a liquid or slurry form which subsequently hardens to form a liquid proof seal to reduce the flow of molten polystyrene from melting of the adjacent layer of insulation, into the fire below.
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 July 8, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 8, 2020.
- 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.