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Expired Canadian patentCanada

Photoradiator

CA 1264584 C · Owner: Mori, Kei · Inventors: Mori, Kei

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 photoradiator includes a notch at an axial end or in the periphery thereof in order to radiate light which propagates therethrough. Light is radiated in a desired direction and in a desired quantity at the notch. Even the optical property of the light radiated from the photoradiator may be varied for a desired application.

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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 January 23, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2007.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 30, 1983
GrantedJanuary 23, 1990
Term endedJanuary 23, 2007
Patent numberCA 1264584 C
Classification (IPC)G02B6/00 +1 more

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedNov 30, 1983Patent grantedJan 23, 1990Term endedJan 23, 2007

Sources & verification

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