Ridge cap roof ventilator applied in assembled, rolled form and method of installing same
CA 2233271 C · Owner: Liberty Diversified Industries, Inc. · Inventors: Morris, Richard J.; Kasner, Gary P.; Stoll, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roof ventilator fabricated from a corrugated plastic sheet material having at least one planar ply and a generally convoluted ply defining a grain comprises a plurality of panels formed from the corrugated plastic sheet material. The plurality of panels are generally stacked and connected to one another to form a vent section the vent section having a longitudinal axis and being rolled in a direction generally parallel with the longitudinal axis so as to define a generally spiral configuration.
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 26, 1998 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 2020.
- 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.