Patents by Inventor George Andreescu

George Andreescu 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).

  • .beta.-lactam antibiotics
    Patent number: 4598074
    Abstract: Alpha-carboxy-3-thienylmethyl penicillin having either the R- or the S- configuration at C-10 is obtained in cyrstalline form. The isomers show improved stability and higher biological activity as compared to the amorphous RS material.
    Type: Grant
    Filed: May 2, 1983
    Date of Patent: July 1, 1986
    Assignee: Beecham Group P.L.C.
    Inventors: George Andreescu, Dennis E. Clark, William J. Kerr