Patents by Inventor Manuel Francisco

Manuel Francisco 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).

  • Stress activated high load additives for lubricant compositions
    Patent number: 5308522
    Abstract: A lubricant composition which comprises a major amount of a lubricating oil base stock and a minor amount of a benzotriazole of the formula: ##STR1## where R and R.sup.1 are hydrocarbyl groups having from 1 to 30 carbon atoms. The load-carrying properties of the benzotriazoles of the formula (I) are activated by subjecting the lubricant composition to load-carrying conditions.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: May 3, 1994
    Assignee: Exxon Research and Engineering Company
    Inventors: Manuel A. Francisco, Thomas L. Ashcraft, Alan R. Katritzky
  • Acidic promotion of transition metal sulfide catalysts for selective hydrogenation
    Patent number: 4950386
    Abstract: It has now been discovered that hydrocarbon feeds containing a polycyclic aromatic compound or mixtures thereof can be selectively hydrogenated by contacting the feed with a transition metal catalyst and hydrogen in the presence of an acid to provide a hydrocarbon mixture in which the aromatic content consists substantially of mono- and di-aromatic compounds. Useful acids include Lewis acids and acids having a pKa in the range of 0 to about -10.
    Type: Grant
    Filed: August 15, 1988
    Date of Patent: August 21, 1990
    Assignee: Exxon Research and Engineering Company
    Inventor: Manuel A. Francisco