Compaction roller assembly and grader
CA 2202147 C · Owner: Roth, Scott R. · Inventors: Roth, Scott R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compaction roller assembly (10) includes a lobed non-circular impact roller (12) operably mounted on a draw frame (14) and a grader (16) operably mounted behind the impact roller (12) to level the corrugated ground surface produced by the impact roller. The grader (16) includes a pair of diverging frame members (22) with a pair of blades (54) mounted thereon and depending therefrom with the lower edges of the blades lying within a generally horizontal plane. A plurality of teeth (60) may be mounted to the frame members (22) to scarify the soil, each tooth (60) being removably connected to the frame members to permit ease of conversion between a grader blade and a scarifier. Each …
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 October 18, 1995 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2017.
- 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.