Use of strong organic acid polyelectrolyte salts in test means, test device, and method for determining the ionic strength or specific gravity of a liquid sample
CA 1202866 A · Owner: Miles Laboratories, Inc. · Inventors: Wang, Joseph Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved test means, device and method for determining the ionic strength or specific gravity of an aqueous sample are disclosed. The test means comprises a weakly basic polyelectrolyte polymer salt and an indicator means capable of producing a detectable response to ion exchange between the polymer salt and the test sample. The polymer salt is one in which one or more of the basic moieties of the polymer is present as the salt of a strong organic acid.
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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 April 8, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 8, 2003.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.