Device and method for removing ice and snow from roofs and overhangs
CA 2196477 C · Owner: Bonerb, Timothy C. · Inventors: Bonerb, Timothy C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device and method for removing ice and snow from roofs whereby a flexible sleeve, attached to the lower part of a roof is remotely inflated thereby shattering , the ice in a, controlled and safe manner. In the preferred embodiment a mounting frame is , sealingly, attached to the roof surface and is configured to removably retain the flexible, inflatable, sleeve in position on the roof. A number of retention means are disclosed. However, the, preferred means is a zipper assembly which is easy to operate and retains the overall, flexibility of the inflatable sleeve to allow it to be rolled up for easy storage when it is, removed from a roof. The lower end of the inflatable sleeve …
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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 31, 1997 and granted August 3, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 31, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 31, 2019.
- 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.