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Expired Canadian patentCanada

Method of describing a color image using a triaxial planar vector color space

CA 1312290 C · Owner: Huntsman, James R. · Inventors: Huntsman, James R.

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Overview

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

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Abstract From the Canadian patent

The present invention relates to a method of describing a color in a newly defined trigonal planar vector color space, said description utilizing an achromatic component and only two chromatic components. This method is useful for describing colors in a way which more closely relates to human color perception than other color spaces and is particularly useful for color reproduction by the photographic, printing and, electrophotographic processes.

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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 5, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 5, 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.
FiledMarch 21, 1989
GrantedJanuary 5, 1993
Term endedJanuary 5, 2010
Patent numberCA 1312290 C
Classification (IPC)H04N1/46 +1 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedMarch 21, 1989Patent grantedJan 5, 1993Term endedJan 5, 2010

Sources & verification

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