Process for the production of radioisotopes of selenium
CA 2335609 A1 · Owner: Kokhanyuk, Vladimir M. · Inventors: Kokhanyuk, Vladimir M.; Zhuikov, Boris L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A beam of accelerated charged particles irradiates an arsenide target such as , gallium arsenide or aluminum arsenide to produce radioisotopes of selenium , and other radionuclides. The irradiated target is placed in a niobium tantalum, or graphite vessel (8) and inserted into a tube (1). Metallic reagents consisting of an alloy of iron nickel, and chromium (stainless , steel) or metallic aluminum are mixed with the target material. The target is then heated to 1000-1100 ~C. The metallic reagents prevent arsenic sublimation, destroy the crystalline structure of arsenide target and remove , other impurities, such as zinc-65. The target is then heated a second time to about 1300 ~C …
Read the whole patent
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 June 22, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 22, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 22, 2021.
- 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.