Gripping device for timber
CA 2127723 C · Owner: Nickel, Donald C. · Inventors: Nickel, Donald C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gripping device is provided for use with vertical or near vertical timbers on building sites, especially with 2" x 4" 2" x 6", or 2" x 8" , planks, and, which allows such timbers to be used with a series of the devices forming steps of, a temporary ladder. The timber may be leaning against a surface or may be , part, of a scaffold or studs of a house. The device may be formed of a single piece of, rod, or as a casting. 1t has a closed loop part suitable for use as a step and also, has a retaining part, the retaining part and loop having parallel portions defining, an open sided recess for receiving the timber. At least one of the parallel portions, has a set of teeth facing the other …
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 July 5, 1994 and granted December 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 5, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 5, 2016.
- 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.