Increasing uplift resistance of metal standing seam roof
CA 2094310 C · Owner: Bellem, Norman A. · Inventors: Bellem, Norman A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seamed metal roof is formed from an array of panels having lateral edges interconnected by rolled seams and a plurality of clamps, each comprising a first elongate part having a mating surface, a longitudinal recess having dimensions like those of the seam, a second elongate part having a mating surface opposing the recess and the mating surface of the first part, and a fastener for drawing said parts together, to confine the seam in the recess.
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 April 19, 1993 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 19, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 19, 2015.
- 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.