Radioactive benzodiazepine derivative and processes for producing the same
CA 1304364 C · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Nakatsuka, Iwao; Yoshitake, Akira; Shiba, Kunio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel radioactive benzodiazepine derivative represented by the general formula:, wherein R is hydrogen or a lower alkyl; X* is a radioactive iodine or bromine; Y is hydrogen or a halogen and Z is a halogen or nitro group; or a salt thereof. The compounds enable non-invasive detection of benzodiazepine receptors in human or animal brains, other organs or tissues. Additionally the compounds enable dynamic tracing of the change in receptor concentration. The compounds are very useful as radioactive diagnostic agents for nuclear medicine in vitro or in vivo or as radio-pharmaceuticals.
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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 30, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 30, 2009.
- 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.