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Expired Canadian patentCanada

Isotopically labeled chemically stable reagents and process for the synthesis thereof

CA 2527809 C · Owner: Pounds, Jerry Scot · Inventors: Pounds, Jerry Scot

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Abstract From the Canadian patent

A radioisotope labeled reagent includes a compound having the general formula (I) where a in each occurrence independently is a carbon mass number between 11 and 14 inclusive, b in each occurrence independently is a hydrogen mass number between 1 and 3 inclusive, such that a in each occurrence is not 12 simultaneously with b in each occurrence being 1; L is a leaving group R1SO2-O- R1 -S-, 12C1H3(12C1 H2)n-S-R1C(O)O-, NC- (R1)3P-, XMg- and Li-, where n is , an integer between 0 and 3 inclusive where X is chloro, bromo or iodine, where R1 is H aryl, a substituent containing aryl, C1-C20 alkyl a , substituent containing C1-C20 alkyl C2-C20 alkenyl, a substituent containing C2-C20 …

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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

  • Filed May 28, 2004 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2026.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 28, 2004
GrantedJuly 10, 2012
Term endedMay 28, 2024
Patent numberCA 2527809 C
Classification (IPC)C07C309/63 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedMay 28, 2004Patent grantedJuly 10, 2012Term endedMay 28, 2024

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.