Analyte concentration measurement using a hollow frustum
CA 2212601 A1 · Owner: Lifescan, Inc. · Inventors: Pugh, Jerry Thomas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for measuring the concentration of an analyte in a sample of a biological fluid involves a hollow, frustum-shaped disposable device. The smaller end of the frustum has a porous membrane to which the sample is, applied. Preferably a reagent in the membrane reacts with the analyte to cause a color change. The device is mounted on a meter which measures the color, change and computes from the change the analyte concentration in the sample. Preferably the devices are released from the meter without touching them to, protect against contamination.
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 August 6, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 6, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 6, 2019.
- 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.