Roofing plate, a proofing strip for a roofing plate, and a method of producing a roofing plate
CA 1248321 A · Owner: Dansk Eternit-Fabrik A/S · Inventors: Leth, Verner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roofing plate (10), such as a corrugated interlocking tile, is at its, upper side surface provided with a proofing strip (27) arranged extending across the corrugations of the roofing plate at the upper edge thereof. The proofing strip (27) is constituted by a strip of upright synthetic fibres, such as a combination of polyamide fibres of a length of 3 mm and of a length of 5 mm and of thickness of 0.05 mm (22 dtex). The strip (27) is adapted to provide a barrier when it is clamped between the upper side surface of the roofing plate and the lower side surface of an adjacent roofing plate and the, barrier permits the passage of air from the inside of a loft defined below the roofing plates …
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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 January 10, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 10, 2006.
- 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.