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Expired Canadian patentCanada

Slit lamp instrument with fill-in illumination

CA 1314033 C · Owner: Stopar, Viktor · Inventors: Geiss, Gunter; Stopar, Viktor; Muller, Ortwin

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

Slit lamp instrument consisting of a stereomicroscope, a slit illumination device rotatable about a vertical axis, a fill-in illumination device and a mechanical system coupling the stereomicroscope and illumination devices. The fill-in illumination device can be rotated about a vertical axis independently of other instrument components.

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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 March 2, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 2, 2010.
  • 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 9, 1988
GrantedMarch 2, 1993
Term endedMarch 2, 2010
Patent numberCA 1314033 C
Classification (IPC)A61B3/10 +1 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedNov 9, 1988Patent grantedMarch 2, 1993Term endedMarch 2, 2010

Sources & verification

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