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Expired Canadian patentCanada

Method for the direct determination of physical properties of hydrocarbon products

CA 1333447 C · Owner: Espinosa, Alain · Inventors: Ventron, Gilbert; Lambert, Didier Charles; Martens, Andre

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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 properties of a product and/or the yield of the product from a hydrocarbon conversion or separation process are determined from the NIR (Near Infra Red) spectrum of the feedstock by a method which comprises the following steps:, (a) determining with an IR spectrometer the absorbance of the feedstock at a certain number of frequencies in the spectral range 16667 to 3840 cm-1, preferably 12500 to 3840 cm-1 most preferably, 4760 to 4999 cm-l starting from a defined base line and, (b) determining the property by applying a correlation between the property and the absorbance values, the correlation being determined experimentally by multivariate regression depending on the type of, …

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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 December 13, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 13, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 17, 1988
GrantedDecember 13, 1994
Term endedDecember 13, 2011
Patent numberCA 1333447 C
Classification (IPC)G01N21/25 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedAug 17, 1988Patent grantedDec 13, 1994Term endedDec 13, 2011

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