Indicator compounds, methods of their preparation and use of those compounds in an iron assay system
CA 1323630 C · Owner: Hugl, Herbert · Inventors: Heidenreich, Holger; Hugl, Herbert; Fossati, Piero
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is related to compounds of the general formula (I), (I), wherein, R1 denotes hydrogen halogen or C1-C4 alkyl, R2 denotes C1-C4 alkyl aryl or heteroaryl, or a, substituted C1-C4 alkyl aryl or heteroaryl and X de-, notes hydrogen or Na and their preparation. The compounds can be used in an iron assay system.
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 26, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 26, 2010.
- 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.