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Expired Canadian patentCanada

Tangent flow cylinder head

CA 2000265 C · Owner: Smith, Stephen · Inventors: Smith, Stephen

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

Abstract of the Disclosure An internal combustion engine cylinder head includes a lower water jacket chamber with a plurality of angularly spaced exhaust passages extending therethrough. Partition webs connect each of the passage walls with the jacket periphery to separate the jacket chamber into alternate inlet and outlet sections through which coolant flows around each exhaust passage from the inlet to the outlet section. The webs are made tangent to the passage walls on their sides toward their respective outlet sections to avoid forming stagnant pockets for coolant in the outlet sections between the passage defining walls and the boundary wall. The webs may also extend tangent to …

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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

  • Filed October 6, 1989 and granted March 29, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2009.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 6, 1989
GrantedMarch 29, 1994
Term endedOctober 6, 2009
Patent numberCA 2000265 C
Classification (IPC)F02F1/10 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedOct 6, 1989Patent grantedMarch 29, 1994Term endedOct 6, 2009

Sources & verification

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