Roofing system having lightweight base sheet
CA 1313448 C · Owner: Vogler, Karl H. · Inventors: Schmidt, Alfred H. F.; Vogler, Karl H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Roofing System Having Lightweight Base Sheet A new roofing system comprising a roof deck a hot, bitumen impervious non-woven polyester web base sheet having a polymer latex coating on at least one side thereof, and a roof surface secured to the base sheet to render the roofing system water impermeable.
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 February 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 2010.
- 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.