Isotopically labeled chemically stable reagents and process for the synthesis thereof
CA 2527809 C · Owner: Pounds, Jerry Scot · Inventors: Pounds, Jerry Scot
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract 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.
Timeline
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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.