High capacity paper clips
CA 2118751 A1 · Owner: Acco Usa, Inc. · Inventors: Walker, Myles M. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In general the paper clips to this invention, comprise a pair of outer bridge portions an outer, clamping portion, a pair of torsion-generating portions, an inner clamping frame, and a pair of contoured inner bridge portions. Each outer bridge portion is substantially rectilinear and has a length of equal magnitude. The outer clamping frame has a pair of outer clamping portions, each being rectilinear and extending so that they converge together at a reinforced outer tip portion. Each torsion-generating portion is substantially rectilinear and extends substantially perpendicularly from its respective outer bridge portion for a distance less than the length each respective outer bridge …
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 March 10, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 10, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2016.
- 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.