Apparatus providing means for mitigating radon from a dwelling
CA 2299650 A1 · Owner: Kilburn, Jack M. · Inventors: Stidham, William; Kilburn, Jack M.; Kilburn, John L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This disclosure relates to an affordable kat for reducing the level of radon in a, dwelling. This inexpensive kit contains a newly designed rain-proof exhaust vent, holding a common axial fan attached to a flex-duct. The kit can be installed by, homeowners and handymen. The installer will simply make a hole in the bandboard, atop the foundation wall, insert the kit and place the distal end of the , attached flex duct into a sub-slab, block wall or crawl-space de-pressurization point. An existing sump, pump or drain tile will leave as a de-pressurization point and make the kit even easier to, install.
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 February 25, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 25, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2022.
- 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.