Implant for percutaneous sampling of serous fluid and for delivering drug upon external compression
CA 1294843 C · Owner: Wang, Paul Y. · Inventors: Wang, Paul Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An implant comprises interconnected compartments with inlet and outlet and can be used for sampling of entered serous fluid or to hold drug concentrate for selective delivery, if desired. The compartments are formed by sealing around porous foam rings between a top and a bottom layer of biocompatible elastic membrane with a polymer paste which sets to form a rubbery shell. The top membrane layer over the compartment is punctured to create a small resealable channel. Upon subcutaneous implantation serous, fluid under hydrostatic pressure seeps into the interior through the puncture orifice. The entered fluid may be withdrawn by an hypodermic syringe through the rubbery side wall to obtain …
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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
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.