Patents by Inventor Stephen C. Quay

Stephen C. Quay 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).

  • Heterocyclic derivatives of DTPA used for magnetic resonance imaging
    Patent number: 5087440
    Abstract: Gadolinium and calcium chelates of DTPA (diethylenetriaminepentaacetic acid) bisamides, such as a composition comprising a gadolinium chelate of a 6-carboxymethyl-3,9-bis (hydroxyalkyl-carbamoylmethyl)-3,6,9-triazaundecanedioic acid and a calcium chelate of a 6-carboxymethyl-3,9-bis(hydroxyalkyl-carbamoylmethyl)-3,6,9- triazaundecanedioic acid, are disclosed for use as magnetic resonance imaging contrast media.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: February 11, 1992
    Assignee: Salutar, Inc.
    Inventors: William P. Cacheris, Stephen C. Quay