Configurative control for hvac systems
CA 2133519 C · Owner: Chan, Chi-Ping · Inventors: Friday, Arthur F. Jr.; Chan, Chi-Ping; Desmarais, Brett A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Programmable system and process are disclosed for adapting a generally written HVAC control program to a number of different HVAC systems. The system and process include a separate interface to the control program and a separate interface to the control elements of each particular HVAC system. Configuration data for the particular HVAC system defines the relationship between software variables of the control program and the control elements of the particular HVAC system. The configuration data is utilized when information is to be transferred between the interfaces.
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 October 3, 1994 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 3, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 3, 2016.
- 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.