Patents by Inventor Paolo Casellato

Paolo Casellato 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).

  • Preparation of biphosphonic acids and salts thereof
    Patent number: 7332603
    Abstract: A process for preparing alendronate sodium includes the reaction of gammabutyric acid with phosphorous acid and phosphorus trichioride and subsequent treatment with an aqueous solution of an alkali metal hydroxide, in which the reaction is conducted in liquid ionic solvents.
    Type: Grant
    Filed: November 25, 2002
    Date of Patent: February 19, 2008
    Assignee: Chemi S.p.A.
    Inventors: Lorenzo De Ferra, Stefano Turchetta, Pietro Massardo, Paolo Casellato
  • Preparation of biphosphonic acids and salts thereof
    Publication number: 20050288509
    Abstract: A process for preparing bisphosphonic acids, characterized in that the reaction of synthesis is conducted in a reaction consisting of bisphosphonic acids.
    Type: Application
    Filed: November 25, 2002
    Publication date: December 29, 2005
    Inventors: Lorenzo De Ferra, Stefano Turchetta, Pietro Massardo, Paolo Casellato
  • Process for preparing high purity azithromycin
    Publication number: 20050222052
    Abstract: A method for preparing high purity azithromycin is described characterised in that the intermediate 9a-deoxo-9a-aza-9a-homoerythromycin A is crystallised and obtained at very high purity, the subsequent methylation reaction effected on said intermediate proceeding with very high specificity and conversion enabling azithromycin of particularly high purity to be obtained.
    Type: Application
    Filed: June 4, 2003
    Publication date: October 6, 2005
    Inventors: Stefano Turchetta, Pietro Massardo, Paolo Casellato