Electrolytic sensors
CA 2000185 C · Owner: Mineral Industry Research Organisation · Inventors: Fray, Derek John; Kumar, Ramachandran Vasant
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Electrolytic sensors, for detecting and measuring concentrations of minor polyvalent elements in metallurgical melts, have two electrodes separated by an oxidic solid electrolyte matrix, on which is deposited a compound of the element to be measured and an element which is mobile in the matrix. A preferred electrolyte matrix is .beta.-alumina, and preferred deposition compounds are phosphates, sulphates and silicates of the alkali or alkaline earth metals.
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 October 5, 1989 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2011.
- 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.