Expired Canadian patentCanada
Dragline bucket
CA 1257888 A · Owner: Esco Corporation · Inventors: Briscoe, Terry L.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a dragline bucket wherein the center of gravity is along a line making an angle of at least 90° with a line from the tooth tip to the horizontal pivot axis of the dragline hitch. Also disclosed is a movable hitch.
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 July 25, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 25, 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.
FiledJune 21, 1988
GrantedJuly 25, 1989
Term endedJuly 25, 2006
Patent numberCA 1257888 A
Classification (IPC)E02F3/48 +2 more
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.