Overhead boom mining shovel
CA 2333835 A1 · Owner: Bucyrus International, Inc. · Inventors: Gilmore, Carl D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mining shovel includes a frame having upwardly extending vertical members. A stiff leg having a lower end pivotally connected to the frame and , an, upper end. A dipper handle has a connecting end pivotally connected to the stiff leg, upper end, and a dipper end. A boom having a connecting end connected to the support member above the stiff leg lower end extends forwardly over the dipper handle. A crowd handle is mounted in the support member.
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 February 1, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 1, 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.