Breathable non-asphaltic roofing underlayment
CA 2544568 C · Owner: Mehta, Vinay · Inventors: Mehta, Vinay; Kerkar, Awdhoot Vasant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-asphaltic roofing underlayment that is breathable water resistant and , skid-resistant is disclosed. The non-asphaltic roofing underlayment includes a woven or non-woven substrate in which at least one surface thereof includes a breathable thermoplastic film disposed thereon. The breathable thermoplastic film imparts water-resistant to the substrate as well as maintains the breathability of the substrate.
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 November 1, 2004 and granted August 5, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.