A ring binder
CA 2328135 A1 · Owner: Chan, Keung · Inventors: Chan, Keung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a ring binder (100) including a ring binder mechanism (106) secured to a cover, wherein the ring binder mechanism (106) includes a pair of pivoting plates to which half-rings (112) are mounted and the pivoting plates , are, movable between a first configuration in which the half-rings (112) are open and a, second configuration in which the half-rings (112) are closed and the ring , binder, (100) includes a holder (114 202) for releasably engaging with a compact disk (210).
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 December 13, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 2022.
- 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.