Patents by Inventor Jose R. Fernandez Lizarbe

Jose R. Fernandez Lizarbe 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).

  • Process for the preparation of 3-chloro-cefem compounds
    Patent number: 5229509
    Abstract: The process comprises a series of stages essentially comprising the protection of the functional groups of the side chain of Ampicillin, esterification of the acid group, oxidation to sulphoxide, expansion of the thiazole ring to a thiazine ring, ozonolysis of the exomethylene cefam derivative obtained, substitution of the hydroxyl group by chlorine and de-protection of the functional groups, in which the order of some stages can be varied without affecting the final result.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: July 20, 1993
    Assignee: Antibioticos, S.A.
    Inventors: Rosa M. Nieves Elvira, Santiago Conde Ruzafa, Jose R. Fernandez Lizarbe