Patents by Inventor Babu R. Vishnuvajjala

Babu R. Vishnuvajjala 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).

  • Method of preparing 1,2-diaminocyclohexane tetrachloro platinum (IV) isomers
    Patent number: 4658047
    Abstract: The present invention is a method of preparing tetrachlorodiamine cyclohexane platinum (IV) by reacting a diamine selected from the group consisting of 1,2-diaminocyclohexane and operable isomers thereof in the form of a dihydrohalide with alkali metal or hydrogen hexachloroplatinate. The preferred hexachloroplatinate is potassium salt and the isomers utilized from the diamine are selected from the group consisting of cis, trans (d,l), trans-l, and trans-d. The process noted is where the 1,2-diaminocyclohexane is used in about equimolar amounts with hexachloroplatinate which is subjected to heating at reflux temperature for 12-24 hours in aqueous solvent, cooled and filtered.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: April 14, 1987
    Assignee: The United States of America as represented by the Department of Health and Human Services
    Inventor: Babu R. Vishnuvajjala