Resin secured mine roof anchor assembly
CA 1251959 A · Owner: Birmingham Bolt Company · Inventors: White, Claude C.; Carr, Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CLAUDE C. WHITE and FREDERICK CARR, RESIN SECURED MINE ROOF ANCHOR ASSEMBLY ABSTRACT OF THE DISCLOSURE, A mine roof anchor assembly for co-operation with a dual compartment resin and cartridge inserted into a mine roof opening the anchor assembly, including an elongate bolt that has a head at one end and is threaded at the opposite end thereof, a predetermined length of the bolt being unthreaded a rebar engaged with the threaded end of the elongate bolt; an expansion shell carried by the elongate bolt subjacent the rebar the expansion shell, including a plurality of wedge segments a plurality of wall engaging ribs, extending outwardly from the outer surface of the wedge segments the inner, …
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
- Granted April 4, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 4, 2006.
- 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.