Drainage structure cleaning tool and method
CA 2644036 C · Owner: Harr, Robert E. · Inventors: Harr, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tool for cleaning a drainage structure comprises a rod (1102) having a center longitudinal , axis, a barrel housing (1112) having a proximal opening and a distal opening the barrel , housing having a center longitudinal axis and coupled coaxially to the rod the barrel housing , having an outside dimension that can be accommodated within the drainage structure, the , distal opening of the barrel housing having a sinusoidal tearing contour (1114). The tool , further comprises a plurality of cutting implements (1116) radially coupled to and between , the rod and the barrel housing the cutting implements having a distal cutting edge and being , angularly oriented to facilitate sweeping …
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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 March 22, 2006 and granted October 2, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 22, 2026.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.