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Expired Canadian patentCanada

Starting aid for small internal combustion engines

CA 1279796 C · Owner: Dull, Carl · Inventors: Dull, Carl; Scott, William A.

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 choke assembly or starting aid for small internal combustion engines is disclosed. An inertia valve is resiliently biased in the bore of the engine, The inertia valve is responsive to vibration of the internal combustion engine for providing a controlled amount of combustion air into the carburetor of the internal combustion engine.

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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 February 5, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 26, 1987
GrantedFebruary 5, 1991
Term endedFebruary 5, 2008
Patent numberCA 1279796 C
Classification (IPC)F02M1/08 +1 more

Timeline

Timeline From CIPO dates

1988199119941997200020032006Application filedMarch 26, 1987Patent grantedFeb 5, 1991Term endedFeb 5, 2008

Sources & verification

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