Patents by Inventor Theodoropulos Spyros

Theodoropulos Spyros 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 for preparing isocyanates from halosilyl carbamates
    Patent number: 4130576
    Abstract: Isocyanates are prepared directly from amines in a facile process which involves the reaction with halosilyl compounds to form novel halosilyl carbamates. The isocyanate may then be derived from the carbamate intermediate by gentle heating. In accordance with one aspect of the invention, isocyanates can be formed which contain a further reactive functional moiety, such as hydroxyl, amino, mercapto, nitro, sulfonamido, amido, carboxyl or the like.
    Type: Grant
    Filed: December 19, 1977
    Date of Patent: December 19, 1978
    Assignee: Union Carbide Corporation
    Inventors: Eddie Hedaya, Theodoropulos Spyros
  • Halosilyl carbamates
    Patent number: 4064151
    Abstract: Isocyanates are prepared directly from amines in a facile process which involves the reaction with halosilyl compounds to form novel halosilyl carbamates. The isocyanate may then be derived from the carbamate intermediate by gentle heating. In accordance with one aspect of the invention, isocyanates can be formed which contain a further reactive functional moiety, such as hydroxyl, amino, mercapto, nitro, sulfonamido, amido, carboxyl or the like.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: December 20, 1977
    Assignee: United Carbide Corporation
    Inventors: Eddie Hedaya, Theodoropulos Spyros