Method for control data base updating of a redundant processor in a process control system
CA 2016191 C · Owner: Honeywell Inc. · Inventors: Mody, Pankaj H.; Mclaughlin, Paul F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process control system includes a process controller which has a first and second controller one, of the controllers being designated as a primary controller and the other controller being designated as a secondary controller. Each controller has a respective data base. The primary controller performs predefined control functions of the process control system which includes updating the data base associated with the primary controller as a result of performing the predefined control functions. A method for updating the data base associated with the secondary controller comprises the steps of performing the control functions. Results therefrom are utilized to update the data base …
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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 7, 1990 and granted April 2, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2012.
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Timeline
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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.