Multi-variable processes
CA 2392380 C · Owner: Curvaceous Software Limited · Inventors: Wilson, John Gavin; Brooks, Robin William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Control and output-quality variables of a process plant (1) are plotted against parallel axes in a display unit (7). Convex hulls between pairs of variables are calculated from sets of the variable-values accumulated historically in stores (7 9) , during successive runs of the process and hulls (H; TC, BC) between , successive axis-pairs are displayed. New variable-values for process optimisation are fixed for the variables taken in turn each selection , being made within displayed ranges (Rn-Rn) derived from the hulls effective between the respective variable and the variables already fixed. A display unit (13) provides on-line parallel-axis display of variable-values from the plant …
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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 November 27, 2000 and granted February 8, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 27, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 27, 2022.
- 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.