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Expired Canadian patentCanada

Scored concave-convex rupture disk and method of manufacture

CA 1268024 C · Owner: Clift, Miner E. · Inventors: Clift, Miner E.

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

The present invention relates to methods of manufacturing scored concave-convex rupture disks wherein the disks are score after forming on the convex side away from the, pressure vessel or "process" of which the disk controls pressure so that product cannot build-up in the score and speed corrosion and/or alter burst pressure.

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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 April 24, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 24, 2007.
  • 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 17, 1986
GrantedApril 24, 1990
Term endedApril 24, 2007
Patent numberCA 1268024 C
Classification (IPC)B21D51/24

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedDec 17, 1986Patent grantedApril 24, 1990Term endedApril 24, 2007

Sources & verification

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