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Expired Canadian patentCanada

Radiant heat recouperation

CA 1081069 A · Owner: Pyreflex Corporation · Inventors: Berg, Charles A.

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

Radiant energy emitted from a source (e.g. a heated workpiece within an industrial furnace) is recouperated by the placement of an array of reflective cells in the path of the emitted beam. Each reflective cell comprises multiple reflecting surfaces for reflecting the incident beam back toward the opening even if the beam is not perpendicular to any of the reflecting surfaces. In atypical construction, the front face of a substrate is coated with a material (e.g. gold) that has a high reflectance in the infrared. Structures and techniques are taught for reducing scattering and dispersion losses.

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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 July 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 8, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedJuly 8, 1980
Term endedJuly 8, 1997
Patent numberCA 1081069 A
Classification (IPC)F27D17/00 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJuly 8, 1980Term endedJuly 8, 1997

Sources & verification

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