Patents by Inventor Nilka Yajaira Leon

Nilka Yajaira Leon 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).

  • Antioxidant combination and synthetic base oils containing the same
    Patent number: 9150812
    Abstract: Disclosed are compositions of a major amount of alkylated aromatics compounds, in particular alkylated naphthalene and alkylated benzene, optionally combined with API Group II, Group III, Group IV and/or ethylene copolymers, showing improved thermo-oxidation performance when containing an additive combination including an alkylated or non-alkylated diarylamine and a sulfur-containing metal passivator. Particularly, the lubricating compositions include at least 55 wt % of a base oil selected from the group consisting of alkylated naphthalene, alkylated benzene and combinations thereof, and from 0 wt % to 45 wt % of another base oil component. The ratio of amine component to sulfur component in the additive combination is from 1:1 to 20:1. The compositions contain an amount of base oil other than alkylated naphthalene, alkylated benzene and API Group II, Group III, Group IV and/or ethylene copolymers of less than 10 wt % based on the total weight of the components comprising the lubricating composition.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: October 6, 2015
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Kathleen Kim Cooper, Angela S. Galiano-Roth, David Alan Blain, Eugenio Sanchez, Nilka Yajaira Leon, James T. Carey, Oleg Yurievich Melnichenko
  • NOVEL ANTIOXIDANT COMBINATION AND SYNTHETIC BASE OILS CONTAINING THE SAME
    Publication number: 20130252863
    Abstract: Disclosed are compositions of a major amount of alkylated aromatics compounds, in particular alkylated naphthalene and alkylated benzene, optionally combined with API Group II, Group III, Group IV and/or ethylene copolymers, showing improved thermo-oxidation performance when containing an additive combination including an alkylated or non-alkylated diarylamine and a sulfur-containing metal passivator. Particularly, the lubricating compositions include at least 55 wt % of a base oil selected from the group consisting of alkylated naphthalene, alkylated benzene and combinations thereof, and from 0 wt % to 45 wt % of another base oil component. The ratio of amine component to sulfur component in the additive combination is from 1:1 to 20:1. The compositions contain an amount of base oil other than alkylated naphthalene, alkylated benzene and API Group II, Group III, Group IV and/or ethylene copolymers of less than 10 wt % based on the total weight of the components comprising the lubricating composition.
    Type: Application
    Filed: March 8, 2013
    Publication date: September 26, 2013
    Applicant: EXXONMOBIL RESEARCH AND ENGINEERING COMPANY
    Inventors: Kathleen Kim Cooper, Angela S. Galiano-Roth, David Alan Blain, Eugenio Sanchez, Nilka Yajaira Leon, James T. Carey, Oleg Yurievich Melnichenko