Fastening element assembly
CA 2006471 C · Owner: Hilti Aktiengesellschaft · Inventors: Ehmig, Gerhard; Maier, Michael; Hachtel, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A fastening element assembly for use in a hard receiving material, such as concrete masonry, and the like, includes a sleeve and a fastening element or bolt. The sleeve forms a blind bore in the receiving material. At its leading end in the, insertion direction, the sleeve has a cutting edge. The sleeve is rotated by rotational force transmitted to engagement faces on the sleeve. After the borehole is drilled by the sleeve, the bolt is driven through the sleeve into the receiving material.
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 21, 1989 and granted November 15, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2011.
- 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.