Theophylline assay
CA 1308780 C · Owner: Wilshere, Jane Margot · Inventors: Foulds, Nicola Clare; Wilshere, Jane Margot
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
ABSTACT, An electrochemical method of assay foe determining theophylline in a sample comprises contacting the sample with an alkaline phosphatase and with a phosphate ester which is a substrate for the alkaline phosphatase and from which an electroactive compound can be released by catalytic activity of the alkaline phosphatase electrochemically oxidising the electroactive compound detecting current arising from the electrochemical oxidation, comparing the detected current with that obtained from a standardised electrochemical oxidation and evaluating the level of theophylline in the sample.
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
- Granted October 13, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 13, 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.