Scraper blade for toothed buckets of earth working machines
CA 2239975 C · Owner: Hall, William I. · Inventors: Hall, William I.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A scraping blade adapted for quick, simple and easy attachment to and removal from a bucket of the type used with a backhoe or like earth working machine wherein the lower cutting edge of the bucket has a plurality of outwardly projecting, teeth terminating in tapered cutting/tearing points. The blade includes front and, hack plates providing a straight lower scraping edge and a substantially "V" shaped, upwardly open receptacle or socket sized and configured to receive and snugly engage the projecting points of the bucket teeth. The front plate includes forwardly angled end sections adapted to prevent the spill over of dirt from the, blade as it is being used to scrape and/or level …
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 June 10, 1998 and granted January 28, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2020.
- 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.