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Expired Canadian patentCanada

Target construction

CA 2237802 C · Owner: Brejcha, Robert J. · Inventors: Brejcha, Robert J.

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

A target for use with darts, for example has a base on which a target frame is secured the, frame having a plurality of spaces within each of which is a segment that is movable toward the base when it is struck by a thrown dart. Corresponding ones of the segments have cavities therein for the accommodation of inserts which are movable independently of the segment toward the target base when such inserts are struck by a thrown dart. The inserts are so arranged that, together they form an, annulus or ring of individually displaceable components. Interposed between the target base and the target segments and inserts are switches and a resilient biasing pad which bias the segments to an …

Read the whole patent

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.

Why it's free to use

  • Filed May 15, 1998 and granted March 5, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 15, 2018.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 2020.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 15, 1998
GrantedMarch 5, 2002
Term endedMay 15, 2018
Patent numberCA 2237802 C
Classification (IPC)F41J5/05 +1 more

Timeline

Timeline From CIPO dates

1999200120032005200720092011201320152017Application filedMay 15, 1998Patent grantedMarch 5, 2002Term endedMay 15, 2018

Sources & verification

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