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Expired Canadian patentCanada

Radio labeled dihematoporphyrin ether and its use in detecting and treating neoplastic tissue

CA 1337986 C · Owner: University Of Cincinnati · Inventors: Gluckman, Jack L.; Chen, I-Wen; Maxon, Harry R. Iii

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Abstract From the Canadian patent

Radiolabeled dihematoporphyrin ether having the following general formula, wherein at least one of R1-R6 is a moiety labeled with a radionuclide imaging agent is useful in providing a non-invasive nuclear scintillation image. This dihematoporphyrin ether localizes in neoplastic tissue and thus provides a method of imaging and recording the location of neoplastic tissue. When the labeling agent has an adequate component of particulate radiation, the dihematoporphyrin ether can be used as a therapeutic agent as well as a diagnostic imaging agent.

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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 January 23, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 23, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 24, 1986
GrantedJanuary 23, 1996
Term endedJanuary 23, 2013
Patent numberCA 1337986 C
Classification (IPC)C07D519/00 +2 more

Timeline

Timeline From CIPO dates

198719901993199619992002200520082011Application filedJan 24, 1986Patent grantedJan 23, 1996Term endedJan 23, 2013

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