A ring binder mechanism
CA 2335442 A1 · Owner: To, Chun Yuen · Inventors: To, Chun Yuen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a housing for a ring binder mechanism in which the housing, includes a number of tabs extending generally towards a longitudinal axis of the, housing. There is also disclosed a ring binder mechanism including a housing supporting a pair of carrier rails to which a number of half-rings are mounted, in, which the housing includes a number of tabs extending generally towards a longitudinal axis of the housing, and the pair of carrier rails are movable between a, first configuration in which the half-rings are closed and a second configuration in, which the half-rings are open.
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 12, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2023.
- 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.