Device for controlling heating boilers
CA 2114985 C · Owner: Martensson, Goran · Inventors: Martensson, Goran
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for heating boilers (1) in heating plants comprises a means (2) for heating a heat carrying medium present in the boiler and circulating out thereof in the heating plant as well as a means (11) adapted to detect the temperature of the heat carrying medium present in the boiler and send signals to the heating means (2) to start and stop the heating of the medium when a first lower temperature level is underpassed and a second higher temperature level is exceeded, respectively, by the medium in the heating boiler (1). The device comprises further means (12) adapted to delay the start of the heating means (2) when the first temperature level is reached by the medium and this is …
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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 February 4, 1994 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 4, 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.