Chemical testing systems
CA 1076936 A · Owner: Wellcome Foundation Limited (The) · Inventors: Cowsar, Donald R.; Harrison, Steadman D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A test system and method is described for determining under alkaline conditions if a material (eg. uric acid) oxidizable by iodine is present in a fluid in an amount equal to or greater than a predetermined amount and which, includes an indicator, for indicating the presence of iodine, and an iodine generator, for rapidly generating iodine in situ on activation by water to, colour the indicator, the system being applied to a test strip. There is also provided a source of basic anions capable upon activation of neutralizing excess protons remaining after generating-iodine in situ, to permit rapid oxidation of the material oxidizable by iodine without substantially interfering with the rapid …
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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 May 6, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 6, 1997.
- 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.