Concrete-made panel and method of fabricating the same
CA 2230608 C · Owner: Kabushiki Kaisha Mcera Light · Inventors: Nakamura, Mitsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pair of first and second concrete layers (1 2) spaced away from each, other by a certain distance are connected to each other through a corrugated plate, (3) having a uniform magnitude of amplitude so that there are formed a space between the concrete layers (1, 2). A weight of a concrete-made panel is decreased by this hollow structure. A corrugated plate (3) is designed to have a, trapezoidal cross-section of rectangular corrugation. By sinking mountain and valley portions of the corrugated plate into the first and second concrete layers (1, 2), the concrete-made panel can have enhanced compressive strength in a direction of corrugation of the corrugated plate (3) and have enhanced , …
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 June 20, 1997 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2019.
- 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.