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Expired Canadian patentCanada

High throughput screening methods for lubricating oil compositions

CA 2554477 C · Owner: Wollenberg, Robert H. · Inventors: Wollenberg, Robert H.

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Abstract From the Canadian patent

Methods for determining the compatibility of a plurality of fluid samples of different lubricating oil compositions with elastomers is provided. Each sample includes one or more base oils of lubricating viscosity and one or more lubricating oil additives. The methods can advantageously be optimized using combinatorial chemistry, in which a database of combinations of lubricating oil compositions are generated. As market conditions vary and/or product requirements or customer specifications change conditions suitable for , forming desired products can be identified with little or not downtime.

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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 February 10, 2005 and granted July 9, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 10, 2005
GrantedJuly 9, 2013
Term endedFebruary 10, 2025
Patent numberCA 2554477 C
Classification (IPC)C40B40/04 +2 more

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedFeb 10, 2005Patent grantedJuly 9, 2013Term endedFeb 10, 2025

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