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Expired Canadian patentCanada

Process of marking hot steel ingots

CA 1330282 C · Owner: Stangl, Kurt · Inventors: Stangl, Kurt

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

For the provision of durable and easily legible inscriptions by jet spraying on steel ingots when they are at an elevated temperature, a nickel or iron metal powder having a largest particle dimension not in excess of 0.075 mm and a zirconium oxide powder or aluminum oxide powder having a largest particle dimension not in excess of 0.075 mm and used in an amount that is not in excess of 10% by weight of the metal powder are jointly sprayed onto the surface of the steel ingots to form dots or lines thereon.

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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 21, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 21, 2011.
  • 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 12, 1989
GrantedJune 21, 1994
Term endedJune 21, 2011
Patent numberCA 1330282 C
Classification (IPC)B22D7/00 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedApril 12, 1989Patent grantedJune 21, 1994Term endedJune 21, 2011

Sources & verification

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