Non-deformable frame for spectacles, and in particular spectacles for children so obtained
CA 2122723 C · Owner: Curto, Caterino · Inventors: Longo, Gianantonio; Curto, Caterino
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A non-deformable frame assembly for spectacles having a pair of lens surrounds joined by an upper connecting bar and a lower bridge connector said, upper connecting bar comprising a torsion bar having respective ends fixedly attached to each of the lens surrounds and said lower bridge connector comprising a first metallic element having one end affixed to one of said lens surrounds and having another end comprising an internally threaded blind hole; and a second metallic element having one end affixed to the other of said lens surrounds and having another end comprising a male threaded termination engageable into said threaded blind hole.
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 February 2, 1994 and granted December 30, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 2, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 2, 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.