Wood air diffuser for use in saltwater aquarium foam fractionators
CA 2543317 C · Owner: Watt, Ronald D. · Inventors: Watt, Ronald D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An air diffuser has a wood block with two end-grain faces at opposite ends and an elongated air chamber extending substantially parallel to and equidistant from the end-grain faces. Air under pressure is supplied to the air chamber. The air chamber is otherwise closed to cause air under pressure in the air chamber to travel through the wood block to the end-grain faces and diffuse into surrounding water when the diffuser is immersed therein.
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 April 12, 2006 and granted February 28, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.