Patents by Inventor Pyare Khanna

Pyare Khanna 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).

  • Novel ether substituted fluorescein polyamino acid compounds as fluorescers and quenchers
    Patent number: 4318846
    Abstract: Diether symmetrically substituted fluoresceins are provided having at least one anionic group and a linking functionality. Depending upon the site of substitution, the compounds can be used as fluorescers absorbing at wavelengths in excess of 500 nm or as quenchers, absorbing at wavelengths in excess of 500 nm and exhibiting substantially no fluorescence. The compounds find wide application, particularly as labels in fluorescent immunoassays.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: March 9, 1982
    Assignee: Syva Company
    Inventors: Pyare Khanna, Edwin F. Ullman