Serum pretreatment in vitamin b12 assay
CA 1321344 C · Owner: Dworschack, Robert T. · Inventors: Khanna, Pyare L.; Dworschack, Robert T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Serum samples for vitamin B12 analysis can be pertreated using a combination of peroxy acid and dithiothreitol. The pretreatment makes vitamin B12 bound to serum binding proteins available for analysis by any of a variety of currently available assay techniques. The pretreatment finds particular use in an assay using solid phase intrinsic factor as a specific binding protein.
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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 August 17, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 17, 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.