Patents by Inventor Geraldo Barini

Geraldo Barini 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).

  • Polyalkene-substituted carboxylic acid compositions having reduced chlorine content
    Patent number: 6562904
    Abstract: The residual chlorine content of a polyolefin-substituted carboxylic acylating agent formed by a chlorine-assisted reaction of a polyolefin and an &agr;,&bgr;-unsaturated carboxylic reactant can be reduced by heating the polyolefin-substituted carboxylic acylating agent having a residual chlorine content in the presence of an &agr;,&bgr;-unsaturated carboxylic reactant, optionally in the further presence of a sulfonic acid. Residual chlorine content can be further reduced by using, in the reaction of the polyolefin &agr;,&bgr;-unsaturated carboxylic reactant, a high speed mixer provided with a dual pitch blade.
    Type: Grant
    Filed: June 25, 2001
    Date of Patent: May 13, 2003
    Assignee: Infineum International Ltd.
    Inventors: Geraldo Barini, Sanjeev Sharma, Jeremy R. Spencer, Michael T. Minotti, Antonio Gutierrez, William M. Davis, Robert A. Kleist
  • POLYALKENE-SUBSTITUTED CARBOXYLIC ACID COMPOSITIONS HAVING REDUCED CHLORINE CONTENT
    Publication number: 20030018133
    Abstract: The residual chlorine content of a polyolefin-substituted carboxylic acylating agent formed by a chlorine-assisted reaction of a polyolefin and an &agr;, &bgr;-unsaturated carboxylic reactant can be reduced by heating the polyolefin-substituted carboxylic acylating agent having a residual chlorine content in the presence of an &agr;, &bgr;-unsaturated carboxylic reactant, optionally in the further presence of a sulfonic acid. Residual chlorine content can be further reduced by using, in the reaction of the polyolefin &agr;, &bgr;-unsaturated carboxylic reactant, a high speed mixer provided with a dual pitch blade.
    Type: Application
    Filed: June 25, 2001
    Publication date: January 23, 2003
    Inventors: Geraldo Barini, Sanjeev Sharma, Jeremy R. Spencer, Michael T. Minotti, Antonio Gutierrez, William M. Davis, Robert A. Kleist
  • Manufacture of functionalized polymers
    Patent number: 5624999
    Abstract: A functionalised polymer, especially an ashless dispersant or a viscosity index improver dispersant, suitable for use as a lubricating or fuel oil additive, or as an intermediate for use in the manufacture of such an additive, is prepared from reactants in different phases by reacting the reactants in a reaction region defined by adjacent surfaces between which there is relative movement or in a thin film on a surface over which they move.
    Type: Grant
    Filed: May 12, 1995
    Date of Patent: April 29, 1997
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Alessandro Lombardi, Geraldo Barini, Carmine D'Antonio, Stefano Gusi