Roof barrier
CA 2452066 C · Owner: Kersbergen, Robert William · Inventors: Kersbergen, Robert William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The barrier comprises a vertical strap a pair of opposing centering elements for guiding extending outwardly from the vertical strap and a pair of brackets inserted into the pair of opposing centering elements for guiding. Each pair of brackets includes a flat curved element situated in a plane perpendicular to the vertical strap and has at one extremity a cutout. A guiding plate situated in a plane parallel to the vertical strap is attached to another extremity of the flat curved element. The guiding plate is inserted into opposing centering elements for guiding. A rail is inserted into the pair of brackets through the cutout of each of the flat curved element. Several U-brackets are …
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 December 22, 2003 and granted December 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 22, 2025.
- 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.