Support system for reducing formation of decubitus ulcers
CA 2000508 C · Owner: Knapp, William Charles · Inventors: Barnett, Richard Irwin; Knapp, William Charles
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A support system that reduces the likelihood of breakdown of human skin, and hence formation of decubitus ulcers, is disclosed. The system comprises two sheets of flexible material bonded together to provide a plurality of separate cells that are capable of being alternately and repeatedly inflated and deflated by means of a fluid contained in the cells. The flexible material is impermeable to the fluid. The cells are of a size and shape and with an intercellular spacing such that in at least one of the width and length of the system, the distance between centres of adjacent inflated cells is less than the human two-point discrimination threshold and the support system is capable of …
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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 October 11, 1989 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.