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Expired Canadian patentCanada

Device for connecting exchanger tubes to perforated plates

CA 1112964 A · Owner: S.E.R.A. Husson Societe D'Etudes Et Realisations Aerodynamiques · Inventors: Husson, Jean

CIPO record

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

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Abstract From the Canadian patent

IN THE CANADIAN PATENT OFFICE, PATENT APPLICATION entitled, "DEVICE FOR CONNECTING EXCHANGER TUBES TO PERFORATED PLATES", in the name of, Soci?t? Anonyme styled S.E.R.A. HUSSON Soci?t? d'Etudes et R?alisations A?rodynamiques ABSTRACT OF THE DISCLOSURE, A device for connecting in sealing-tight relationship the end of a glass vertical tube 1 to the edge 7 of a hole 6 perforated in a rigid plate 2 comprises a resilient ring 3 having in axial half-section the shape of a flattened Z, said ring being made up of two cylindrical sleeves 4 and 5 which partly enclose one another and are axially offset in relation to one another.

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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 November 24, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 24, 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.
FiledDecember 2, 1976
GrantedNovember 24, 1981
Term endedNovember 24, 1998
Patent numberCA 1112964 A
Classification (IPC)F28F9/06 +1 more

Timeline

Timeline From CIPO dates

19771980198319861989199219951998Application filedDec 2, 1976Patent grantedNov 24, 1981Term endedNov 24, 1998

Sources & verification

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