Ring binder cover
CA 2118527 C · Owner: Podosek, Edward · Inventors: Podosek, Edward; Beleckis, Vytautas Kazimeras
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ring binder cover (4) is composed of a pair of thermoplastic sheets (20 22), superimposed in edge-to-edge relation with a stiffener insert panel (23) disposed, therebetween. The insert panel bears two parallel grooves (25 27) which , divide the, insert into a spine zone (30) and two cover zones (24 26). The material of , the insert, lying at the bottom of the grooves forms a pair of webs (32 34) which, combined, with the adjacent portions of the cover sheets form hinges between the spine , and, each cover. The peripheral. edge portions (40) of the two thermoplastic sheets are, sealed together and provide a sealed envelope for the stiffener insert which defines, semi-rigid back and …
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 April 21, 1993 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2015.
- 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.