Curled finger hinge binder
CA 2266331 A1 · Owner: Duo-Tang, Inc. · Inventors: Honeker, Klaus; Mullin, Howard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A loose leaf binder includes a first half binder section (12) having a plurality of curled fingers (11) spaced regularly apart and a second half binder section (14) having a corresponding plurality of correspondingly spaced curled fingers (11). Each of the first and second half binder sections (12 14) include a plurality of protruding tabs (16) and a plurality of tab openings (15), each of the plurality of protruding tabs of the first half binder section (12) being capable of mating with a corresponding one of the plurality of tab openings of the second half binder section (14). When the first half binder section is mated with the second half binder section the , protruding tabs of …
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 September 11, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 11, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 11, 2020.
- 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.