Expired Canadian patentCanada
Method for quantitation of calcium and magnesium
CA 2032053 C · Owner: Hoffmann-La Roche Inc. · Inventors: Kaufman, Richard Allen; Denton, James Bradley; Dixon, Diane Jean
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for determining the quantity of calcium or magnesium in an analytical sample and the novel reagent compositions.
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 December 12, 1990 and granted June 18, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 12, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 12, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 12, 1990
GrantedJune 18, 2002
Term endedDecember 12, 2010
Patent numberCA 2032053 C
Classification (IPC)G01N33/84 +2 more
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.