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Expired Canadian patentCanada

Precast furnace pipe insulation

CA 1065751 A · Owner: Plibrico (Canada) Limited · Inventors: Davis, Raymond W.; Downey, Paul J.J.

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

A precast reinforced insulating member and a method of manufacturing same. The reinforced insulating member is used for covering a furnace pipe or the like and comprises a body of insulating material, a plurality of reinforcing coil members and weldable lugs secured at each end of the reinforcing coil members. The body of insulating material has an arcuate shaped inner surface adapted to extend in intimate contact with the surface of a furnace tube in use and a pair of transverse side faces. The reinforcing coil members are embedded in the body and extend circumferentially thereof at longitudinally spaced intervals along the length of the body. Each of the coil members has oppositely …

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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 November 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 6, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedNovember 6, 1979
Term endedNovember 6, 1996
Patent numberCA 1065751 A
Classification (IPC)F16L59/02

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedNov 6, 1979Term endedNov 6, 1996

Sources & verification

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