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Expired Canadian patentCanada

Boronic acid adducts of rhenium and radioactive isotopes of rheniumdioxime complexes

CA 1284649 C · Owner: Treher, Elizabeth N. · Inventors: Francesconi, Lynn C.; Treher, Elizabeth N.

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Abstract From the Canadian patent

Boronic acid adducts of radioactive isotopes of rhenium dioxime complexes having the formula ReX(Y)3Z, wherein X is an anion;, Y is a vicinal dioxime having the formula or a pharmaceutically acceptable salt thereof wherein R1 and R2 are each independently hydrogen halogen, alkyl, aryl, amino or a 5 or 6-membered nitrogen or oxygen containing heterocycle or, together R1 and R2 are -(CR8R9)N-wherein n is 3 4, 5 or 6 and R8 and R9 are each independently hydrogen or alkyl; and, Z is a boron derivative of the formula B-R3, wherein R3 is hydroxy, alkyl, alkenyl cycloalkyl, cycloalkenyl, alkoxy, carboxyalkyl carboxyalkenyl, hydroxyalkyl, hydroxyalkenyl alkoxyalkyl, alkoxy-, alkenyl, haloalkyl …

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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 June 4, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 23, 1988
GrantedJune 4, 1991
Term endedJune 4, 2008
Patent numberCA 1284649 C
Classification (IPC)C07F13/00

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedSep 23, 1988Patent grantedJune 4, 1991Term endedJune 4, 2008

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