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Expired Canadian patentCanada

Ceiling structure

CA 1188125 A · Owner: Teron International Urban Developments Corporation Ltd. · Inventors: Teron, William

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

A combined ceiling, air distribution system mechanical chasse and structural roof member for a building is formed by a plurality of parallel inverted U-shaped structural modules 15 which are supported in a common horizontal plane. The flanges 17 of adjacent modules are spaced apart and define the side walls of a duct 21 top and bottom walls, 22, 24 for the duct also being supported between the adjacent modules. The duct may be of any suitable dimensions and in, particular may be sufficiently large as to handle air flow requirements for the heating, ventilating or air conditioning system for the building. The duct may also accommodate other services such as electrical, plumbing compressed …

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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 4, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2002.
  • 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 8, 1982
GrantedJune 4, 1985
Term endedJune 4, 2002
Patent numberCA 1188125 A
Classification (IPC)E04F13/14 +2 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedApril 8, 1982Patent grantedJune 4, 1985Term endedJune 4, 2002

Sources & verification

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