Improvements to installations for cleaning tubes by circulating spongy balls, in particular improvements relating to impregnating the balls with water
CA 2126282 C · Owner: Technos Et Compagnie · Inventors: Bizard, Andre
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
To impregnate with water the spongy balls (1) that are to be used for cleaning the tubes of a condenser the balls are put into a tank (2) whose upper portion forms a chamber (10) that is separated from the remainder of the tank by a grid (9) to which the balls cannot pass the chamber is connected to a pump (17) having a piston (19) and then after the tank and the volumes in communication therewith have been filled with water all of the valves giving access to the tank are closed the piston of the pump is pulled back, thereby causing air to be expelled from the balls in the chamber and the volume is again completely refilled with water so as to evacuate said air and impregnate the balls with …
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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 June 20, 1994 and granted August 13, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2016.
- 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
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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.