Patents by Inventor Alessandra Ziggiotti

Alessandra Ziggiotti 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).

  • New silylating agent for the preparation of chromatographic supports
    Patent number: 5021600
    Abstract: A new mono-silylating agent of general formula (I)(R.sub.1,R.sub.2,R.sub.3)Si--NH--CO--O--Si(R.sub.1,R.sub.2,R.sub.3) (I)is described as well as its use in the preparation of chromatographic supports based on silica with functional groups covalently bonded thereto, the so-called "bonded stationary phases".The new compounds are easy and safe to prepare from the coresponding mono-halosilanes with ammonium carbamate, and their use as silylating agents leads to stationary phases with a higher degree of surface coating than that attainable with the corresponding chlorosilanes.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: June 4, 1991
    Assignees: Eniricerche S.p.A., Sclavo S.p.A.
    Inventors: Franco Cardinali, Maria G. Longobardi, Giuseppe C. Viscomi, Alessandra Ziggiotti