Tamping tool
CA 2085915 A1 · Owner: Crowell, James E. · Inventors: Crowell, James E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tamping tool comprising a shank having at its lower end a paddle of hardened steel construction such paddle, having a front face, and one or more bits of abrasion resistant material secured to the front exposed face of, the paddle and terminating at its or their lower end or ends in a ledge which underlies the lower end of the paddle. Exposed faces of the paddle and adjacent parts of the shank are covered by abrasion resistant material.
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 December 21, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2014.
- 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.