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Expired Canadian patentCanada

Process and composition for color stabilized distillate fuel oils

CA 1306355 C · Owner: Reid, Dwight K. · Inventors: Reid, Dwight K.

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Abstract From the Canadian patent

This invention relates to processes and compositions for color stabilized distillate fuel oils which comprises an effective color stabilizing amount of (a) a tertiary amine having the formula wherein R and R' are the same or different alkyl groups having one to about six carbon atoms, and (b) a hydroxylamine having the formula wherein R and R' are the same or different and are hydrogen alkyl, alkaryl or aralkyl groups, wherein the weight ratio of (a):(b) is from about 1:1 to about 99.7:0.3. Preferably the alkyl, alkaryl, and aralkyl groups of the hydroxylamine have from one to about twenty carbon atoms. It is further preferred that (a) is N,N-dimethylcyclohexylamine and (b) is …

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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 August 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 18, 2009.
  • 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 22, 1988
GrantedAugust 18, 1992
Term endedAugust 18, 2009
Patent numberCA 1306355 C
Classification (IPC)C10L1/22

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJan 22, 1988Patent grantedAug 18, 1992Term endedAug 18, 2009

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