Built-up support member
CA 2031447 C · Owner: Natterer, Julius · Inventors: Natterer, Julius
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A built-up support member for carrying bending loads is used in building construction. The support member is formed of two separate elements one superimposed on the other. The separate elements absorb normal forces caused by bending loads. One of the elements for example formed of, concrete, acts in compression while the other acts in tension. Shear forces must be transmitted between the separate elements. Shear transmission surfaces afford a positively locked connection of the separate elements. The shear transmission surfaces include cooperating and complementary shaped projections and recesses. In addition, clamping elements can be provided between the separate elements in an …
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 December 4, 1990 and granted April 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 4, 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.