Arylazo chromoionophores
CA 2104839 C · Owner: Bloczynski, Michael L. · Inventors: Bocker, Thomas; Corey, Paul F.; Bloczynski, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are arylazo chromoionophores characterized by the formula:, (See formula I), wherein X is hydrogen or a monovalent cation Y is H or, methoxy and R is a ringed aromatic organic structure which affects the optical absorption properties of the compounds. also disclosed is a method for the detection of calcium ion using these compounds.
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 25, 1993 and granted July 2, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 25, 2015.
- 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.