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Expired Canadian patentCanada

Three-dimensional and tomographic imaging device for x-ray and gamma-ray emitting objects

CA 1211232 A · Owner: National Aeronautics And Space Administration · Inventors: Yin, Lo I.

CIPO record

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Abstract From the Canadian patent

An instrument for obtaining quantitative three-dimensional and, tomographic information relating to x-ray and gamma-ray emitting objects and for the orthoscopic viewing of such objects includes a multiple-pinhole aperture plate (22) held spaced from an x-ray or gamma-ray to visible-light converter (24) which is coupled to a visible-light image intensifier (26). The spacing between the aperture plate and the converter is chosen such that the mini-images of an emitting object formed by the pinholes do not substantially overlap as they impinge on the converter. The output of the image intensifier is digitized by a digitizing camera (36) in terms of position and intensity and fed into a digital …

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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 September 9, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 9, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 19, 1984
GrantedSeptember 9, 1986
Term endedSeptember 9, 2003
Patent numberCA 1211232 A
Classification (IPC)G01T1/16 +2 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedJan 19, 1984Patent grantedSep 9, 1986Term endedSep 9, 2003

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