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Expired Canadian patentCanada

Pressure deriving port of internal combustion engine

CA 1304635 C · Owner: Mitani, Tateki · Inventors: Mitani, Tateki

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 pressure deriving port of an internal combustion engine having an intake manifold in which at least one of an exhaust gas recirculating port and a blow-by gas discharge port and an opening of said pressure deriving port are formed is opened on an upstream side of the exhaust gas recirculating port and/or blow-by gas discharge port and in a stepped-up portion of an inner wall of intake manifold.

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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 July 7, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 7, 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.
FiledJune 28, 1988
GrantedJuly 7, 1992
Term endedJuly 7, 2009
Patent numberCA 1304635 C
Classification (IPC)F02M26/17 +1 more

Sources & verification

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