Elastic elements and their respective components, manufactured by injection in plastic material, non-metallic, to be used in matress, chair or other purpose
CA 2117306 C · Owner: Dias Magalhaes Queiroz, Joao Roberto · Inventors: Dias Magalhaes Queiroz, Joao Roberto
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention refers to elastic elements - springs - in a convenient form produced by injection moulding, of plastic non-metallic materials and their support interconnection and reinforcement components configurating the "Framework" of a mattress or chair, totally made of plastic replacing metallic wire springs. With the advantages of: manufacturing assembling and, their respective cost, lightweight non-oxidation, the possibility of manufacturing all framework sizes with only one model.
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 September 29, 1993 and granted September 2, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2015.
- 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.