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Expired Canadian patentCanada

Folding display frame

CA 1307641 C · Owner: Patterson, Robert Wayne · Inventors: Wichman, William John; Patterson, Robert Wayne

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Abstract of the Disclosure A collapsible framework constructed of rods pivotally joined at their ends to hubs to form a self-standing unit when expanded and to fold into a small set of nearly parallel rods when folded. The hubs are designed to pivotally join the ends of four rods, with the plane defined by the pivot axes of one pair of opposing rods being offset from the plane defined by the pivot axes of the other pair of opposed rods attached to the same hub. A stab connection latch locks two hubs together and secures the framework in the expanded position. Folding channel bars are attached to knobs on vertically aligned hubs by key-slots the key-, slots of one channel bar being of …

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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

  • Granted September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1987
GrantedSeptember 22, 1992
Term endedSeptember 22, 2009
Patent numberCA 1307641 C
Classification (IPC)E04B1/34 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 9, 1987Patent grantedSep 22, 1992Term endedSep 22, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.