The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 1976
Filed:
May. 22, 1974
Applicant:
Inventor:
Amar Nath, Bala Cynwyd, PA (US);
Assignee:
Drexel University, Philadelphia, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07H / ;
U.S. Cl.
CPC ...
2602117 ; 424201 ;
Abstract
A method is provided for labeling a complex metal chelate with a radioactive metal isotope via isotopic exchange between the metal atom of the complex metal chelate and the radioactive metal isotope. The complex metal chelate, in a suitable redox state, is mixed in solution with a radioactive metal isotope, freeze-dried, exposed to an electron-accepting gas and thereafter subjected to thermal treatment, whereby isotopic exchange occurs and the complex metal chelate is labeled with the radioactive metal isotope. Furthermore, an additional step comprising exposure to an atmosphere of high relative humidity is provided to increase the yield of isotopic exchange.