Foldable frame for a case
CA 2135454 C · Owner: Chen, Chi-Lu · Inventors: Chen, Chi-Lu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A case with a collapsible frame. The collapsible frame has four straight walls and four connectors. Any two continuous straight walls are connected to each other by means of a connector. Each connector has a link assembly and a buckle assembly which consists of a female buckle and a male buckle. A straight wall is linked to the link assembly which is further linked to the male buckle which is engaged with the female buckle which is linked to another straight wall. The link assembly has several links. Any two continuous links have a first relative position so that they are allowed to pivot relative to each other and a second position so that they are kept from pivoting with respect to each …
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 November 9, 1994 and granted July 22, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 9, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 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.