Colorimetric assay for bilirubin
CA 1094432 A · Owner: Eastman Kodak Company · Inventors: Wu, Tai-Wing; Dappen, Glen M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A colorimetric assay method for the detection of bilirubin in various liquid samples, particularly biological liquids. A multi-zone analytical element based on this assay method is also disclosed. The assay method employs an interactive mordant composition for bilirubin having one or more binding sites for bilirubin, such composition comprising a hydrophobic organic matrix and at least one charge-bearing cationic group. Upon mordanting of bilirubin by the interactive mordant composition, the mordanted bilirubin exhibits an absorption peak shift of at least 10 nm and at least a 50%, increase in molar extinction coefficient.
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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 January 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 27, 1998.
- 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.