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Expired Canadian patentCanada

Hollow structure panel for heat storage material and process for producing heat storage material panel using the same

CA 1248861 A · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Saita, Kenji; Harada, Mithuhiro

CIPO record

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Abstract From the Canadian patent

A hollow plate-like panel comprising at least two face plates spaced apart at a given distance from each other and a core member composed of a plurality of unit cells and sandwiched between the face plates at least one hole, being provided in at least one face plate and each unit cell having at least two holes communicating with adjoining unit cells, is suitable for filling a solidifiable heat storage material to give a heat storage material panel with high strength and durability.

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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 January 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 18, 1985
GrantedJanuary 17, 1989
Term endedJanuary 17, 2006
Patent numberCA 1248861 A
Classification (IPC)F28F3/12 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJune 18, 1985Patent grantedJan 17, 1989Term endedJan 17, 2006

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