Method and apparatus for determining low temperature performance of a wax containing fuel
CA 2017793 C · Owner: Exxon Chemical Patents, Inc. · Inventors: Jones, Leslie Graham; Mears, John Nicholas; Lehmann, Edwin William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A test device for assessing low temperature performance of a wax-containing fuel comprises a vessel for containing a fuel to be assessed, means for cooling and, means for heating, the fuel in the vessel a filter, element and means to cause the fuel to pass through the filter of the filter element, the cooling and heating means being so arranged that a stable convection current is set up in the fuel and the filter is so positioned that it receives wax settling from the fuel.
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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 May 30, 1990 and granted August 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 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.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.