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Expired Canadian patentCanada

Solar energy system with composite concentrating lenses

CA 1137372 A · Owner: Stark, Virgil · Inventors: Genequand, Pierre; Stark, Virgil

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

In order to improve the efficiency of a solar energy system utilizing a Fresnel lens for concentrating solar rays on a conduit system or the like only, the central portion of a Fresnel lens otherwise of large, width, is utilized and slide assemblies each containing, a plurality of reflective slides disposed at an angle such as to reflect solar energy to the same focal point as the Fresnel lens, are disposed on each side of the lens thereby effectively increasing the aperture of the lens and increasing the concentration.

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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 December 14, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 14, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 4, 1980
GrantedDecember 14, 1982
Term endedDecember 14, 1999
Patent numberCA 1137372 A
Classification (IPC)G02B3/08 +2 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedJune 4, 1980Patent grantedDec 14, 1982Term endedDec 14, 1999

Sources & verification

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