Closure and seal for prefabricated building panels
CA 2008198 C · Owner: Spronken, John R. · Inventors: Spronken, John R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A closure and seal assembly is described for joining the edges of concrete structural panels. The arrangement comprises three main components, namely a pair of elongated pocket members each adapted to be embedded in a vertical corner of a concrete structural panel and an elongated spline member adapted to connect between the pocket members. Each pocket member has an inner pocket with an elongated opening slot and a pair of resilient sealing strips fixed to the edges of the slot and adapted to extend into the pocket. The spline has a web portion with T-flanges on the side edges thereof with the spline being adapted to be snugly held between the pocket sealing strips and the T-flanges being …
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 January 19, 1990 and granted February 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 19, 2012.
- 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.