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Expired Canadian patentCanada

Coil support structure

CA 1290158 C · Owner: Chang, Dick Y.K. · Inventors: Chang, Dick Y.K.

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

Vertical support for the coil within a base pan is provided by way of a plurality of raised support surfaces that are formed to define on the radially outward side an opening that facilitates the inwardly extending fastener which secures the protective grille to the base pan skirt. Damage that might otherwise be caused to the coil by the fastener is thus, avoided.

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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 October 8, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 8, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1988
GrantedOctober 8, 1991
Term endedOctober 8, 2008
Patent numberCA 1290158 C
Classification (IPC)F25D21/00 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMarch 25, 1988Patent grantedOct 8, 1991Term endedOct 8, 2008

Sources & verification

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