Patents by Inventor Ananda M. Sarker

Ananda M. Sarker 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).

  • Photosensitive intramolecular electron transfer compounds
    Patent number: 5998496
    Abstract: A compound of the general formula:A-L.sup.+ D.sup.-where A is a moiety which absorbs radiation and enters an excited state in which it accepts an electron; D.sup.- is a moiety which donates an electron to the excited state A and releases a free radical; and L.sup.+ is a cationic linking group which tethers electron acceptor moiety A to electron donor moiety D.sup.-. Cationic linking moiety L.sup.+ has the formula:-L'-G-where L' is a moiety which forms a stable radical with acceptor moiety A upon transfer of an electron from donor moiety D.sup.- to electron acceptor moiety A, and G is a moiety which forms a leaving group upon transfer of the electron from donor moiety D.sup.- to acceptor moiety A.
    Type: Grant
    Filed: August 19, 1996
    Date of Patent: December 7, 1999
    Assignee: Spectra Group Limited, Inc.
    Inventors: Salah A. Hassoon, Ananda M. Sarker, Douglas C. Neckers