Negative or vanishing edge for spas and/or hot tubs
CA 2414836 C · Owner: Elkington, Donald Alfred · Inventors: Elkington, Donald Alfred; Toye, Reginald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hot tub or spa (100) has a vanishing or overflow edge (110) not readily visible to a user. Water from tree main holding area (101) overflows the edge (110) into a catch basin (102). A reservoir (120) holds a constant head of water to provide to a pump (112) and also allows for the holding of increased amounts of water displaced by users who are using the hot tub (100). Water flowing over the vanishing edge (110) flows into the catch basin (102) and thence to the reservoir (120) and pump (112) where the water is recirculated into the spa (100).
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 December 19, 2002 and granted January 31, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2024.
- 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.