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Expired Canadian patentCanada

Cyrogenic liquid storage container having an improved access conduit

CA 1187820 A · Owner: Union Carbide Corporation · Inventors: Patel, Nandlal P.; Dolida, Roger J.

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

A double-walled vacuum insulated cryogenic liquid container wherein the access conduit is composed of a material whose strength increases with decreasing temperature with said conduit having a wall thickness which varies in a manner such that when the container is holding a cryogenic liquid the ratio of, bending moment stress in the conduit due to a selected applied force to the strength of the conduit material is substantially constant along the length of the conduit. S P E C I F I C A T I O N - 1 -

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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 May 28, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 28, 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 8, 1982
GrantedMay 28, 1985
Term endedMay 28, 2002
Patent numberCA 1187820 A
Classification (IPC)B65D25/18 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedApril 8, 1982Patent grantedMay 28, 1985Term endedMay 28, 2002

Sources & verification

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