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Expired Canadian patentCanada

Control of hydrogen permeation especially in solar collectors

CA 1182012 A · Owner: Canadian Sun Systems Ltd · Inventors: Dorbeck, Leo R.

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

Hydrogen permeations through a ferritic pipe from a heat conducting aqueous fluid to a heated surface such, as, in a solar collector, is prevented by the utilization of a composite pipe structure which includes means to intercept and convey radially flowing hydrogen.

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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, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 21, 1981
GrantedFebruary 5, 1985
Term endedFebruary 5, 2002
Patent numberCA 1182012 A
Classification (IPC)F24J2/46 +1 more

Timeline

Timeline From CIPO dates

1982198519881991199419972000Application filedApril 21, 1981Patent grantedFeb 5, 1985Term endedFeb 5, 2002

Sources & verification

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