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Expired Canadian patentCanada

Multiple bar straightening and cutting system in bar steel rolling line

CA 2285246 C · Owner: Mizuno, Koji · Inventors: Aoyama, Soichi; Mehara, Akio; Mizuno, Koji

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

93-, A multiple section bars straightening/cutting system in a bar rolling line comprises a multiple section bars straightening apparatus, an inlet side introduction pinch roller, a multiple traveling section bars cutting apparatus and a rear surface tilting table having an outlet side introduction pinch roller. The multiple traveling section bars cutting apparatus includes a fixed blade and a moving blade each having a plurality of calipers formed in accordance with the cross-sectional shapes of the section bars. The rear tilting table tilts in the direction in which the blades of the multiple traveling section bars cutting apparatus move in synchronism with the movement of the blades.

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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

  • Filed January 27, 1999 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 27, 2019.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 2021.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 27, 1999
GrantedMay 20, 2003
Term endedJanuary 27, 2019
Patent numberCA 2285246 C
Classification (IPC)B23D23/00 +2 more

Timeline

Timeline From CIPO dates

2000200220042006200820102012201420162018Application filedJan 27, 1999Patent grantedMay 20, 2003Term endedJan 27, 2019

Sources & verification

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