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Expired Canadian patentCanada

Disposable diaper having wide tapered fastening tapes

CA 1293594 C · Owner: Burkhard, Harold Richard · Inventors: Burkhard, Harold Richard; Buell, Kenneth Barclay

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

A disposable diaper having elasticized leg openings and improved fastening tapes which have a user's end that is wide at the longitudinal sides of the diaper and that is tapered to a more narrow width at its distal end. The wide user's end of the fastening tapes tensions and secures more of the overlapping waist portions of the diaper so that a good fit about the legs and waist is maintained. Tapering of the user's end of the tapes increases wearing comfort and makes them easier to handle and apply.

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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 December 31, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 31, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 19, 1987
GrantedDecember 31, 1991
Term endedDecember 31, 2008
Patent numberCA 1293594 C
Classification (IPC)A61F13/58

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedJan 19, 1987Patent grantedDec 31, 1991Term endedDec 31, 2008

Sources & verification

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