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Expired Canadian patentCanada

Hard surface wiping article

CA 1281250 C · Owner: Sterling Drug Inc. · Inventors: Clark, William Anthony; Pregozen, David

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 pre-moistened wipe for cleaning hard surfaces to a shiny, substantially streak-free and lint-free finish comprising a flexible substrate of a mechanically bonded nonwoven material containing wood pulp and synthetic fibers having incorporated therein a low level of an acrylic polymer and impregnated with a liquid cleaning solution having a surface tension less than 40 dynes/cm and comprising an anionic, nonionic, cationic, zwitterionic or amphoteric surface active agent, a monohydric aliphatic alcohol of 1 to 6 carbon atoms and demineralized water.

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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 March 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 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.
FiledAugust 19, 1986
GrantedMarch 12, 1991
Term endedMarch 12, 2008
Patent numberCA 1281250 C
Classification (IPC)C11D17/04 +1 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedAug 19, 1986Patent grantedMarch 12, 1991Term endedMarch 12, 2008

Sources & verification

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