Patents by Inventor Sandro Spezia

Sandro Spezia 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 enzymatic separation of the optical isomers of alpha-substituted carboxylic acids using esterase from Brevibacterium imperiale
    Patent number: 5302528
    Abstract: A process is described for the separation of the optical isomers of alphayl- or alpha-aryloxy- carboxylic acids by means of the stereoselective hydrolysis of racemic alkyl esters of the above acids in the presence of bacteria or their enzymes, selected from the species Brevibacterium, Bacteridium, Micrococcus, and Bacillus.
    Type: Grant
    Filed: April 22, 1992
    Date of Patent: April 12, 1994
    Assignee: Ministero Dell `Universita` e Della Ricerca Scientifica e Technologica
    Inventors: Ezio Battistel, Daniele Bianchi, Pietro Cesti, Giuliana Franzosi, Roberto Tassinari, Sandro Spezia
  • Enzymatic process for separating the optical isomers of racemic 1,2-diols using lipase
    Patent number: 5231027
    Abstract: The optical isomers of racemic 1,2-diols are separated by enzymatic way, by eans of a process involving the following operations:reaction of the racemic mixture of the 1,2 diols with an organic anhydride in the presence of enzyme belonging to the class of lipases;separation of the enzyme;removal of the excess of anhydride;separation of the produced esters, in optically pure form by column chromatography;recovery of the 1,2 diols, as optically pure enantiomers.
    Type: Grant
    Filed: September 5, 1991
    Date of Patent: July 27, 1993
    Assignee: Ministero Dell `Universita` E Della Ricerca Scientifica E. Technologica
    Inventors: Daniele Bianchi, Aldo Bosetti, Pietro Cesti, Paolo Golini, Sandro Spezia