Lower joint folding preventing device for one touch type dome shaped tent
CA 2044451 C · Owner: Ju, Dong Soo · Inventors: Ju, Dong Soo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lower joint folding preventing device for a one touch type dome shaped tent is disclosed. If the upper joint is locked or released, the lower joint is also locked or released automatically. A connecting portion of the lower joint is provided with a round projection and with an elongated slot, and the middle segment is provided with a socket and a supporting step in such a, manner that the round projection can be mounted upon the supporting step. Further, a coil spring is installed on the neck portion of the lower segment so that the leading end of the coil spring is able to push the tip of the socket.
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 12, 1991 and granted December 27, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2013.
- 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.