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Expired Canadian patentCanada

Index tabs for hanging file folders

CA 2011052 C · Owner: Carlson, Lee A. · Inventors: O'Brien, Karen M.; Carlson, Lee A.

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

An index tab and assemblages thereof to be used in conjunction with hanging file folders and the like in lieu, of individual plastic tab holder and paper insert combinations of the prior art. In the preferred embodiment a plurality of flexible paper or plastic tabs backed by, pressure-sensitive adhesive are carried on a release sheet, comprising tab stock. Each such tab includes opposing bilaterally symmetric sections, each section comprising a message portion and a base portion. The shape of each half of such tabs may be generally similar to the clear individual plastic tab holders of the prior art. A message is placed on the message portion of either or both halves of a tab. The tab is …

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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

  • Filed February 27, 1990 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 27, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 27, 2012.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 27, 1990
GrantedJuly 6, 1999
Term endedFebruary 27, 2010
Patent numberCA 2011052 C
Classification (IPC)B42F21/06

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedFeb 27, 1990Patent grantedJuly 6, 1999Term endedFeb 27, 2010

Sources & verification

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