Technetium-99m complex for examining the renal function
CA 2002850 C · Owner: Nosco, Dennis L. · Inventors: Nosco, Dennis L.; Verbruggen, Alfons M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a technetium-99m complex of the general formula, (see above formula) wherein, -Z is a sulphur atom or an amino group of the general formula R17-N-(R18)k, in which k is 0 or 1 and R17 and R18 have the same meanings as the symbols R1-R16;, - each of the symbols R1-R16 is individually selected from the group consisting of hydrogen, straight or branched, unsubstituted or substituted alkyl having 1-4 carbon atoms, and ACOOH, wherein A is a straight or branched, unsubstituted or substituted alkyl group having 0-4 carbon atoms;, and R5 together with R6 or R7 together with R10 additionally may form an oxygen atom;, -Tc represents technetium-99m; -t is 0 or 1; and, -n is 0 …
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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 November 14, 1989 and granted January 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 14, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2011.
- 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.