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Expired Canadian patentCanada

Process for the control of the inking of a printing press with limitation of the layer thickness and of the tonal-value increase

CA 2012050 C · Owner: Pfeiffer, Nikolaus · Inventors: Pfeiffer, Nikolaus

CIPO record

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Abstract From the Canadian patent

In the control of inking in accordance with colorimetric or densitometric quantities technical, process-related influences must not be ignored during printing if it is intended to achieve optimum adaptation to the printing process and to the colour perception of the human eye. For single- and multi-colour control therefore, processes are proposed that in consideration of, interdependent parameters - maximum allowable tonalvalue increase(s) and maximum allowable layer thickness(es) -, make for a setpoint locus (Set1) said, setpoint locus (Set1) being both within the tolerable tonal-value increase(s) (ZSet ? ZTol or ZSeti ? ZToli) and also within the colour tolerance (ETol) or density …

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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

  • Filed March 13, 1990 and granted December 7, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 13, 2010.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 13, 2012.
  • 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 13, 1990
GrantedDecember 7, 1993
Term endedMarch 13, 2010
Patent numberCA 2012050 C
Classification (IPC)B41F33/16 +1 more

Timeline

Timeline From CIPO dates

1991199319951997199920012003200520072009Application filedMarch 13, 1990Patent grantedDec 7, 1993Term endedMarch 13, 2010

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