Reinforcing composite for roofing membranes and process for making such composites
CA 1283034 C · Owner: Cooper, Ian G. · Inventors: Woiceshyn, Mark; Cooper, Ian G.; O'Connor, Terry J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reinforcing composite for bituminous roofing membranes is made by combining as a first layer an open network of non-woven adhesive-free continuous filament yarns and as second and third layers, placed one on each side of the first layer, lightweight preformed mats or networks and, thereafter impregnating them with an adhesive resin which is then dried or cured.
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
- Granted April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2008.
- 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.