Improvements in roof anchors
CA 2401232 A1 · Owner: Curtin, James Laurence · Inventors: Curtin, James Laurence
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is an anchor for securing a working line (54) to a structure. The anchor includes a sole plate (2) with an attachment (19) for the working line (54). There is at least one friction plate (5) and a connector strap (4). In use of the anchor the sole plate (2) and friction plate (5) are located against respective opposite sides of a rafter (3) of the structure and are linked together by the strap (4) in a manner such that the working line load on the sole plate (2) generates a clamping force between the sole plate (2) and the friction plate (5). This force resists movement of the anchor by gripping only the outside of the rafter (3).
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 3, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 3, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 3, 2023.
- 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.