Patents by Inventor Alberto Santambrogio

Alberto Santambrogio 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).

  • Polymeric additive for lubricating oils
    Patent number: 5425888
    Abstract: Oil-soluble polymer improving the viscosity index of lubricating oils, endowed with dispersant properties and capable of lowering the pour point ("pour point depressant"), obtained by means of a first step of reaction between a polyolefinic copolymer and a mixture of C.sub.8 -C.sub.25 alcohol (meth)acrylates and (meth)acrylic acid and a second step of condensation of the so modified copolymer with a polyamine.
    Type: Grant
    Filed: October 29, 1993
    Date of Patent: June 20, 1995
    Assignee: Agip Petroli S.p.A.
    Inventors: Alberto Santambrogio, Giulio Polimeni
  • Multifunctional additive for lubricating oils
    Patent number: 5322632
    Abstract: A lubricating oil viscosity index improvement additive with dispersant and ntioxidant properties of general formula: ##STR1## where R' is hydrogen or an alkyl, R.sub.a and R.sub.b are alkyl radicals, R.sub.c is a nitrogenated alkyl radical and x, y and z represent relative quantities. The invention also relates to the process for preparing said additive and lubricating oil compositions which contain it.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: June 21, 1994
    Assignee: Ministero Dell `Universita` E Della Ricerca Scientific e Technologica
    Inventors: Paola Gambini, Paolo Koch, Alberto Santambrogio
  • Chemical compounds to be used as solid carriers for fuel additives
    Patent number: 4692170
    Abstract: Chemical compounds, having a melting point between 70.degree. C. and 130.degree. C. and soluble in hydrocarbons, are used as solid carriers in order to dose conveniently additives for fuels for internal combustion engines. The compounds are selected from the group consisting of alkyl-substituted phenols, aromatic carbonates, alkyl-substituted pyrocatechols, polymers of alkyl-substituted 1,2-dihydroquinoline.
    Type: Grant
    Filed: November 29, 1983
    Date of Patent: September 8, 1987
    Assignee: Agip Petroli, S.p.A.
    Inventors: Alberto Santambrogio, Luciano Mattei
  • Process for producing superbasic detergents for lubricant compositions
    Patent number: 4465603
    Abstract: The process for the production of superbasic detergents from sulphonates and/or sulphophenates and an oxide or an hydroxide of an alkali metal or an alkaline earth metal is carried out in the presence of an ester of the carbonic acid, preferably in the presence of dimethylcarbonate.
    Type: Grant
    Filed: November 30, 1982
    Date of Patent: August 14, 1984
    Assignee: Agip Petroli S.p.A.
    Inventors: Paolo Koch, Alberto Santambrogio