Installation for melting snow or ice , especially on roofs and in roof downpipes or the like
CA 2210102 C · Owner: Johnsen, Asle Ingmar · Inventors: Johnsen, Asle Ingmar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An installation for melting of snow or ice e.g. at roof downpipes on flat , roofs in gutters and the like, comprising a heating means (11) a temperature , sensor means (4, 6) and a control unit (1) for connecting and disconnecting the heating means (11) in dependence on sensed temperature. The temperature sensor means comprises a first temperature sensor (4) for sensing the surface temperature at the place of snow or ice melting and a second temperature , sensor (6) for sensing the air temperature at the topical place. On the surface there is further arranged a snow sensor (7) which is connected by the control unit (1) when the first temperature sensor (4) at a rising temperature …
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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 January 17, 1996 and granted August 24, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 17, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 2018.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.