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Expired Canadian patentCanada

Asphalt content gauge with compensation for sample temperature deviations

CA 1312967 C · Owner: Regimand, Ali · Inventors: Regimand, Ali

CIPO record

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Abstract From the Canadian patent

Abstract of the Disclosure The present invention relates to an, improvement in a nuclear measuring gauge for measuring the composition of a hydrogen containing material by counting neutrons which are thermalized by the presence of the hydrogen in the material. The present invention is based upon the recognition that in measuring samples, such as hot asphalt with, such a gauge, the error which is introduced by temperature variations in a sample is a function of not only the temperature of the sample but also its hydrogen content. In accordance with the present invention, this inaccuracy is compensated for by applying to the measurement a correction factor which is a function of both the …

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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 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 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.
FiledJune 23, 1989
GrantedJanuary 19, 1993
Term endedJanuary 19, 2010
Patent numberCA 1312967 C
Classification (IPC)G01N23/02 +2 more

Timeline

Timeline From CIPO dates

1990199319961999200220052008Application filedJune 23, 1989Patent grantedJan 19, 1993Term endedJan 19, 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.