Method of cleaning passageways using a mixed phase flow of a gas and a liquid
CA 2390480 C · Owner: Lai, Ching-Yue · Inventors: Lai, Ching-Yue; Materna, Peter A.; Labib, Mohamed Emam
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Method of cleaning surfaces such as biopsy device (300) using a mixed phase , of an aqueous solution and a flow of gas. The biopsy device (300) has central wire (320) which is surrounded by a sheath (310). The sheath (310) may be made of helically coiled wire having multiple turns (315). In order to mixed phase flow to be introduced for cleaning, it is convenient to use access points already designed into the biopsy device (300) i.e. where wire (320) enters , and leaves the sheath (310). Cleaning of the outside surface of the biopsy device (300) can be accomplished using mixed phase flow by encompassing the exterior of the biopsy device (300) into tube of slightly larger diameter …
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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 December 14, 2000 and granted August 2, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 14, 2022.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.