Sensor controlled surface to sewer feeding system for ice and snow
CA 2035322 C · Owner: Dogens Inc. · Inventors: Godbout, Pierre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed a method and apparatus for disposal of snow in urban areas. Snow is disposed of using existing manhole connections to sewer systems with a portable disposal unit formed of snow receiving bin, a grinding means means for, projecting the ground snow into a trajectory downwardly into the sewer and preferably with sensing means to sense whether there is a blocked sewer conduit as well as to determine the load carrying capacity of the sewer liquid. In this way the, grinding means may be driven by variable speed motors. The system and method permit the use of already existing sewer systems, and is more economical than trucking snow to disposal sites.
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 January 30, 1991 and granted August 26, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2013.
- 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.