Lifting device for slab, panel or sheet materials
CA 2215907 C · Owner: Corbett, James Edmund · Inventors: Corbett, James Edmund
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A lifting device (10) suited for use in the lifting and handling of heavy slabs or, sheets of material from a standing stack is disclosed. The device consists of a, frame (12), comprising side plates (14) and (16) the upper ends of which are , rigidly, secured together by cross-members (18 and 20). The lower portion (16a) of sideplate (16) is angled downwardly and away from the other side-plate and carriage, (30) is arranged for vertical sliding or rolling movement against this portion (16a) so, that it moves inwards as it is raised. A movable plate or jaw (22) is mounted for, horizontal sliding movement on the cross-members (20) being biased away from , the, fixed plate or jaw (14) by …
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 21, 1996 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 21, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 21, 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.