Pour point detection
CA 2025889 C · Owner: Nova Corporation Of Alberta · Inventors: Tsang, Charles Yam-Chuen; Ker, Victoria Shien-Fern
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to an apparatus and process for estimating the pour point-of a hydrocarbon oil. The pour point of hydrocarbon oil gives an indication of its low temperature properties and is, determined according to the time-consuming procedures set out in the American Society of Testing and Material (ASTM) test D-97. The present invention generally provides a convenient means to estimate the pour point of a hydrocarbon oil, by directing a flow of pressurized gas towards a sample of the oil, and determining the warmest temperature at which the gas flow does not pause a substantial surface wave on the oil surface.
Read the whole patent
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 September 20, 1990 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 20, 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.