Vent screen
CA 2244182 A1 · Owner: Azana, Evelyn · Inventors: Azana, Evelyn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for housing and preventing small objects from falling into the duct hole and for holding a filter in place by letting it sit at the bottom floor of this house and let it stay flat and keep it from moving by being covered with a separate piece of material. This device is made of metal plastic or other, materials thin enough to fit into the vent and still leaves enough room to fit the floor register or wall register into the same hole. This device is made of 2pieces: The first piece is made of 4 solid walls with a small part of its top portion bent flat outwards for securing around the floor or wall opening with a screen that is attached to the bottom sides of it and the 2nd piece is …
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 August 31, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 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.