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Expired Canadian patentCanada

Liquid-cooled internal combustion engine

CA 1114258 A · Owner: Kawasaki Jukogyo Kabushiki Kaisha · Inventors: Takada, Toshiyuki; Tamba, Shinichi

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 liquid-cooled internal combustion engine including a cylinder, a cylinder head, a combustion chamber a cooling liquid, chamber disposed around the combustion chamber and a selaing device interposed between the cylinder and the cylinder head to provide a seal therebetween. The sealing device includes an elastic sealing member arranged between ends of outer shells of the cylinder and the cylinder head, and a metallic sealing member arranged between ends of inner shells of the cylinder and the cylinder head.

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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 15, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 15, 1998.
  • 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 13, 1979
GrantedDecember 15, 1981
Term endedDecember 15, 1998
Patent numberCA 1114258 A
Classification (IPC)F02F1/36

Timeline

Timeline From CIPO dates

1980198219841986198819901992199419961998Application filedJune 13, 1979Patent grantedDec 15, 1981Term endedDec 15, 1998

Sources & verification

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