Patents by Inventor John B. Laidler

John B. Laidler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for concentrating technetium-99m
    Patent number: 4176158
    Abstract: The radioactive concentration of technetium-99m contained as pertechnetate ion in aqueous solution is increased by(1) acidifying the solution,(2) contacting the acid solution with a bifunctional ion-exchange material which is an anion-exchanger under acid conditions and a cation-exchanger under alkaline conditions, so that pertechnetate ion is retained thereon, and(3) eluting the pertechnetate ion with a small amount of aqueous alkaline liquid.
    Type: Grant
    Filed: February 3, 1976
    Date of Patent: November 27, 1979
    Assignee: The Radiochemical Centre Ltd.
    Inventors: John B. Laidler, Roy H. Abrahams