Ground anchor
CA 2205568 A1 · Owner: Wilson, James Maxwell · Inventors: Wilson, James Maxwell
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ground anchor comprises a square shaft which is machined at its lower end to form a cylindrical portion on which is welded a helical flight.The shaft is screwed into the ground and a stabilizer attached over the upper end including a sleeve and a plurality of wings. The shaft has a threaded rod atthe upper end which projects through a hole in a top plate of the stabilizer andengages a support sleeve attached to a structure to be supported. In the event that the shaft strikes rock or the like the upper end is cut off and a mountingportion having a base plate attached to the stabilizer.
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 May 15, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 15, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 15, 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.