Warm and cool sick bed
CA 2024136 C · Owner: Liu, Su-Hwa · Inventors: Liu, Su-Hwa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A warm and cool sick bed is provided including a water mattress support from a bed frame. The water mattress containing water that can circulate with that contained in a water chamber settled at the lower section of the bed by means of water pipes, and the water in the water chamber possible to be warmed up by a heater tube or cooled down by a refrigerant tube.
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 28, 1990 and granted June 14, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2012.
- 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.