Folding collapsible frame assembly for an automatic folding umbrella
CA 2129609 C · Owner: Cheng, Jonathan · Inventors: Cheng, Jonathan; Chou, Lue L. C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A folding collapsible frame assembly for an automatic folding umbrella, which includes a lower shaft, an upper shaft made to slide in the upper shaft a collapse control spring, a lock ring moved to lock the collapse control spring in the compressed condition as the umbrella is opened, a stretch control spring controlled by a bottom spring on the handle of the umbrella to automatically push the umbrella into the open condition, a guide control mechanism controlled by a control button on the handle of the umbrella to release the lock ring from the collapse control spring for allowing the umbrella to be collapsed automatically.
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 August 5, 1994 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 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.