Wall anchor accommodating fasteners of varying thread diameters
CA 2172789 C · Owner: Mcelderry, James W. · Inventors: Mcelderry, James W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A wall anchor uses splines on an interior surface of a cylindrical body to accommodate fasteners having different thread diameters. The splines are configured in types. A first type includes at least one spline protruding centrally at a narrow angle while a second type also includes at least one spline protruding centrally at a wider angle. When a fastener such as a #6 or #8 sheet metal screw (SMS) is inserted into the wall anchor, the first type of spline will primarily engage the #6 SMS while the second type of splines are only partially implemented. When a #8 SMS which has a larger thread diameter than a #6 SMS is inserted into the wall anchor, both the first and second types of splines …
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 March 27, 1996 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2018.
- 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.