External corner formative member
CA 2290917 C · Owner: Nichiha Corporation · Inventors: Watanabe, Morimichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An external corner formative member which comprises an angled corner plate portion and a pair of groove portions formed on the opposite sides of the corner plate respectively, for receiving a side edge portion of a building board wherein at least one rib which is adapted to be contacted with the building board so as to function as a weir for preventing rain water from penetrating (or for receiving the kinetic energy of rain water) is projected from the bottom of the groove portions. A broad space is formed between the rib and a back plate portion of the groove so as to interrupt the flow of rain water running toward the interior of building frame. A ridge functioning as a weir may be formed …
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 November 29, 1999 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2021.
- 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.