Patent Yard Sign in
Expired Canadian patentCanada

Single eyepiece binocular microscope

CA 1301498 C · Owner: Wentz, John Budd Iii · Inventors: Wentz, John Budd Iii

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A single eyepiece binocular microscope (2) includes a microscope housing (4) having a generally horizontal base (6) and housing several optical elements. An objective lens (12) is positioned immediately above the specimen (16) and adjacent the base plane (8). A first mirror (22), vertically above the objective lens redirects the light down and away from the observer along a path (28) to intersect a second mirror (32) positioned adjacent the base plane. The second mirror redirects the light along a third light path (34) up and towards the observer (40) for intersection with a rear projection screen (38). A viewing chamber (44) shields the screen from ambient light for a brighter image and …

Read the whole patent

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 May 26, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 26, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 13, 1988
GrantedMay 26, 1992
Term endedMay 26, 2009
Patent numberCA 1301498 C
Classification (IPC)G02B21/36 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJuly 13, 1988Patent grantedMay 26, 1992Term endedMay 26, 2009

Sources & verification

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