Remediation of radioactive waste by stimulated radioactive decay
CA 2335759 A1 · Owner: Brown, Paul M. · Inventors: Brown, Paul M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method for treating long-lived radioisotopes and transmuting them into short-lived radioisotopes through applied nuclear physics. Nuclear reactions, specifically of the (.gamma. n) type also known as , photodisintegration, are utilized to accomplish this transmutation from a radioisotope of given atomic mass to that of lower atomic mass. A radioactive element (1) is irradiated by high-energy photons preferably in the form of , gamma rays. The gamma rays are absorbed by the nucleus of the radioactive element placing it in an excited state. Upon relaxation from the excited state, the nucleus ejects a neutron, thereby transmuting the element to an isotope of lower …
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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 June 25, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.