Paraseismic monolithic concrete construction
CA 2367949 C · Owner: Drya-Lisiecka, Krystyna · Inventors: Drya-Lisiecka, Krystina
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A concrete construction comprising a bottom wall and a plurality of sidewalls extending upright from the bottom wall each sidewall being made of concrete , and having a generally overall corrugated cross section with alternating recesses and ridges extending in a substantially vertical direction. The construction further comprises a top wall intersecting the sidewalls at upper edges thereof, the top wall being made of concrete and having a top face generally parallel to an under face, the under face having a generally corrugated relief with alternating recesses and ridges extending in a substantially horizontal direction. This construction is characterized in that it is an overall …
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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 July 7, 2000 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2022.
- 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.