Patents by Inventor Savino Leone

Savino Leone 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 preparing superalkalinized detergent-dispersant additives for lubricating oils
    Patent number: 5035816
    Abstract: A process for preparing alkylsalicylate superalkalinized detergent-dispersant lubricating oil additives: (a) by the acid catalyzed neutralization of C.sub.12 -C.sub.30 alkylphenol with alkaline earth base in the presence of an azeotropic solvent for the water of reaction; (b) by the carboxylation of the first product with CO.sub.2 to partially convert the alkylphenate to alkylsalicylate; and (c) by sulfurization-superalkalinization of the product in the presence of sulfur, alkaline earth base, azeotropic solvent and added CO.sub.2.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: July 30, 1991
    Assignee: Orogil
    Inventor: Savino Leone
  • Detergent-dispersant additives based on salts of alkaline-earth and alkali metals for lubricating oils
    Patent number: 5030687
    Abstract: Alkylsalicylate-containing detergent-dispersant additives for lubricating oils are obtained by (a) neutralizing an alkylphenol by means of an alkali metal hydroxide; (b) carboxylation of the product with carbon dioxide for maximum conversion of the initial alkali metal alkylphenate into alkali metal alkylsalicylate; (c) sulfurization-superalkalinization of the product in the presence of an alkaline earth base followed by carbonation of the product with carbon dioxide.
    Type: Grant
    Filed: September 20, 1988
    Date of Patent: July 9, 1991
    Assignee: Orogil
    Inventor: Savino Leone
  • Sulfonated and sulfurized detergent-dispersant additives for lubricating oils
    Patent number: 4751010
    Abstract: Disclosed are detergent-dispersant additives useful in lubricating oils prepared by neutralizing an alkylphenol sulfonic acid, followed by sulfurizing/over-alkalinizing the salt obtained and then carbonating the resultant salt.Lubricating compositions comprising a lubricating oil and from about 1 to about 30% by weight of the final composition of a detergent-dispersant additive of the invention are also disclosed.
    Type: Grant
    Filed: July 7, 1986
    Date of Patent: June 14, 1988
    Assignee: Orogil
    Inventors: Savino Leone, Henri Gaessler