Process for producing an air mattress with a pump part and a part to be inflated
CA 2188265 A1 · Owner: Graf, Josef · Inventors: Graf, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for producing an air mattress consisting of a pump part and an inflatable part whereby the pump part is provided with an expandable material and the wall separating the pump part from the inflatable part is provided with a one-way outlet valve and a small aperture for the return flow of air from the inflatable part into the pump part, and whereby the pump part is provided with an inlet aperture and the inflatable part is provided with an outlet aperture. According to the invention, a metallic tool is used for welding the pump part wall between the upper and lower cover of the air mattress which forms part of a high-frequency welding machine provided with …
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 October 20, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2016.
- 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.