Canadian application, no grantCanada
Application of a membrane roof cover system having a polyester foam layer
CA 2476537 A1 · Owner: Wardle, Trevor · Inventors: Wardle, Trevor; Ennis, Michael James
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Affix a membrane roof cover structure, comprising a polyester foam layer and a new membrane layer, over a roof deck structure such that the polyester foam layer is between the roof deck structure and the new membrane layer.
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 March 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 7, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 7, 2003
GrantedNo grant recorded
Term endedMarch 7, 2023
Patent numberCA 2476537 A1
Classification (IPC)E04D11/02 +2 more
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.