Patents by Inventor Sergio Sandri

Sergio Sandri 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).

  • 17.Beta-(alpha-hydroxy)-esters of androstanes as intermediates for the preparation of 17.beta-fluorinated-androstane esters
    Publication number: 20060116359
    Abstract: Process for the preparation of polyhalogenated steroids, in particular of androstanic fluoro derivatives corticosteroids by means of the formation of new androstanic S-hydroxy alkyl or aralkyl-17-carbothioate intermediates.
    Type: Application
    Filed: December 18, 2003
    Publication date: June 1, 2006
    Inventors: Gianfranco Cainelli, Achille Umani Ronchi, Sergio Sandri, Michele Contento, Giuseppe Fortunato, Marco Da Col, Maria Boriani, Stefano Da Col
  • Process for the preparation of 6alpha-fluoro steroids by isomerisation of 6beta-fluorosteroids
    Publication number: 20050192437
    Abstract: The process for the preparation of 6?-fluoro steroids, comprising the reaction of the corresponding 6?-fluoro steroids, or of 6?/6? isomeric mixtures with an organic base having a diazo iminic group, in a suitably selected organic solvent, is described.
    Type: Application
    Filed: March 31, 2003
    Publication date: September 1, 2005
    Inventors: Gianfranco Cainelli, Achille Umani-Ronchi, Sergio Sandri, Michele Contento, Marco Da Col, Maria Boriani, Stefano Da Col
  • Chemical modification of the surface of natural fibers
    Publication number: 20040064900
    Abstract: The present invention relates to polymer-grafted natural fiber used for the preparation of composite materials. The invention relates in particular to a process for making such polymer-grafted natural fibers.
    Type: Application
    Filed: October 17, 2003
    Publication date: April 8, 2004
    Applicant: Universita' Degli Studi Di Bologna
    Inventors: Mariastella Scandola, Sergio Sandri, Massimo Baiardo, Giovanna Frisoni
  • Chemical modification of the surface of natural fibers
    Patent number: 6667366
    Abstract: The present invention relates to polymer-grafted natural fiber used for the preparation of composite materials. The invention relates in particular to a process for making such polymer-grafted natural fibers.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: December 23, 2003
    Assignee: Universita' Degli Studi di Bologna
    Inventors: Mariastella Scandola, Sergio Sandri, Massimo Baiardo, Giovanna Frisoni
  • Chemical modification of the surface of natural fibers
    Publication number: 20020086938
    Abstract: The present invention relates to polymer-grafted natural fiber used for the preparation of composite materials. The invention relates in particular to a process for making such polymer-grafted natural fibers.
    Type: Application
    Filed: July 5, 2001
    Publication date: July 4, 2002
    Applicant: Universita' Degli Studi di Bologna
    Inventors: Mariastella Scandola, Sergio Sandri, Massimo Baiardo, Giovanna Frisoni
  • Isomerisation of 6&bgr;-fluorosteroids into the corresponding 6&agr;-fluoro derivatives
    Patent number: 6369218
    Abstract: Described herein is the isomerisation process of 6&bgr;-fluorosteroids into the corresponding pharmacologically active 6&agr;-fluoro derivatives, comprising the reaction of 6&bgr;-fluorosteroids, or 6&agr;/6&bgr; isomeric mixtures, with an organic base containing a diazoimino group in a suitable organic solvent.
    Type: Grant
    Filed: May 16, 2001
    Date of Patent: April 9, 2002
    Assignee: Farmabios S.r.L
    Inventors: Gianfranco Cainelli, Achille Umani-Ronchi, Michele Contento, Sergio Sandri, Marco Da Col
  • Process for the preparation of a thiazoline-azetidinone
    Patent number: 5721360
    Abstract: The present invention refers to process for the preparation of a tiazoline-azetidinone of formula I ##STR1## which comprises N-protecting in position 1 of (3S,4S)-3-phenylace tamido-4-acetoxy-azetidin-2-one, converting the product thus obtained into the corresponding thioamide and subsequently ciclyzing and deprotecting.
    Type: Grant
    Filed: June 6, 1996
    Date of Patent: February 24, 1998
    Assignee: Biochimica OPS Spa
    Inventors: Gianfranco Cainelli, Achille Umani Ronchi, Michele Contento, Mauro Panunzio, Sergio Sandri, Marco Da Col, Leone Dall'Asta