A housing for a ring binder mechanism
CA 2315560 A1 · Owner: World Wide Stationery Manufacturing Company Limited · Inventors: To, Chun On
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A housing 12 for a ring binder mechanism 10 is disclosed as including a first and, a second longitudinal end, in which ridges or troughs 28 are provided at or adjacent to, the longitudinal ends of the housing 12. A ring binder mechanism 10 and a , ring, binder constructed of such a housing 12 are also disclosed.
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 11, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 11, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 11, 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.