Patents by Inventor Edilberto Colombo

Edilberto Colombo 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).

  • Lubricant compositions containing non-metallic dithiophosphates
    Patent number: 5093016
    Abstract: This invention relates to lubricant compositions containing both zinc O,O'-dialkyldithiophosphates and ashless O,O'-diaryldithiophosphates obtained by reacting an O,O'-diaryldithiophosphoric acid with a diolefin. These lubricant compositions give improved anti-wear performance.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: March 3, 1992
    Assignee: Presidenza del Consiglio dei Ministri Ufficio del Ministro per il Coordinamento Delle Iniziative per la Ricerca Scientifica e Tecnologica
    Inventor: Edilberto Colombo
  • Multifunctional additives for lubricants
    Patent number: 4434291
    Abstract: A multifunctional ashless additive is described having antiwear and antioxidant properties and high antirust power, and is prepared by reacting a O,O'-dialkylthiophosphoric acid with a compound chosen from substituted 2-oxazolines and substituted imidazolines.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: February 28, 1984
    Assignee: Agip Petroli S.p.A.
    Inventor: Edilberto Colombo