Self-inflating cushion
CA 2020005 A1 · Owner: Pfriender, Helmut · Inventors: Geisler, Gunter; Pfriender, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A self-inflating cushion especially a mattress, includes a, foam panel formed of open-celled soft polyurethane foam. The foam panel has lateral edges, sides and openings extending at least partially through the foam panel. Continuous airtight cover strips are glued on both of the sides and at the edges of the foam panel and cover the openings. An air valve is disposed in the vicinity of one of the lateral edges of the foam panel.
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 June 27, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 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.