Therapeutic mattress and method of making
CA 2010086 C · Owner: Thomas, Charles R. · Inventors: Thomas, Charles R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A therapeutic mattress comprises a soft resilient bottom mattress section and a plurality of interconnected top mattress sections and peripherally interconnected. The top section includes top and bottom fabric covers peripherally interconnected. A plurality of parallel rows of stitching interconnect the top and bottom covers and with the peripherally stitching define a plurality of transverse rectangular tubes filled with a compacted resilient fibrous material. The bottom mattress section includes a bottom fabric cover spaced from the top section bottom cover and peripherally interconnected defining an elongated rectangular chamber underlying the top mattress sections. A loosely confined …
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 14, 1990 and granted September 15, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 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.