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Expired Canadian patentCanada

Apparatus for catalytic purifying the effluent gases of internal combustion engines

CA 1102707 A · Owner: Firma Zuena-Starker Kg · Inventors: Preissinger, Peter; Santiago, Enrique; Brich, Jurgen

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

Apparatus for catalytic purification of internal combustion gases wherein a cylindrical catalyst body is housed in an external housing between which a shock absorbing resilient envelope is interposed. A seal ring is provided at at least one end of the body extending outwardly from the frontal edge into abutment with the housing.

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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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 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 17, 1977
GrantedJune 9, 1981
Term endedJune 9, 1998
Patent numberCA 1102707 A
Classification (IPC)F01N3/24 +1 more

Timeline

Timeline From CIPO dates

1978198119841987199019931996Application filedJune 17, 1977Patent grantedJune 9, 1981Term endedJune 9, 1998

Sources & verification

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