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Expired Canadian patentCanada

Method of forming weathertight seal

CA 1301438 C · Owner: Dow Corning Corporation · Inventors: Ouellette, William Vincent; Klosowski, Jerome Melvin

CIPO record

Overview

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

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Abstract From the Canadian patent

Abstract A method of forming a weathertight seal between surfaces which move in relation to each other during the time required for the seal to be applied and cured is disclosed. The seal is formed from a preformed silicone gasket which is bonded in place with a silicone adhesive. The silicone adhesive bonds rapidly and cures because it is either a pressure sensitive adhesive, a two part adhesive which cures rapidly, or is a moisture-curable adhesive which cures rapidly because it is a thin layer in contact with a silicone elastomer, said elastomer being permeable to moisture.

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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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 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.
FiledJuly 30, 1987
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301438 C
Classification (IPC)E04B1/68 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedJuly 30, 1987Patent grantedMay 26, 1992Term endedMay 26, 2009

Sources & verification

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