Supporting wooden panel element for constructing ceilings or bridges and use of a screw for connecting boards to form a panel element
CA 2263997 C · Owner: Meierhofer, Ulrich A. · Inventors: Meierhofer, Ulrich A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns a wooden panel element (1) for constructing ceilings or bridges, a plurality of boards (25) which stand upright transversely to the plane of the panel element (1) and extend over the entire length of the latter being provided. The boards (25) are interconnected by means of screw fastenings. The individual boards (25) are interconnected at least partially by screws (27) inserted at an acute angle to the surface of the boards these , screws (27) each extending through two successive boards (25). Screws (28) which are inserted at right-angles to the surface (26) of the boards (25) are provided near the upper edge (30) and lower edge (31) thereof.
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 August 7, 1997 and granted January 22, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 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.