Patents by Inventor Mahmoud Mostafa Hafez

Mahmoud Mostafa Hafez 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).

  • Method and system to extend lubricant life in internal combustion EGR systems
    Patent number: 6851414
    Abstract: A device and method to extend the useful lubricant life in a diesel engine equipped with an Exhaust Gas Recirculation (EGR) system consisting of placing a chemical filter in an area of relatively higher humidity either in the EGR stream or near the intake manifold. In some cases, placing chemical filters in both locations would be preferred. This device may also be used in combination with a chemical filter placed in the lubricant recirculation system which produces a synergistic effect beyond the individual effects of either component.
    Type: Grant
    Filed: July 15, 2003
    Date of Patent: February 8, 2005
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Jason Zhisheng Gao, Mahmoud Mostafa Hafez, Riccardo Conti
  • Method and system to extend lubricant life in internal combustion EGR systems
    Publication number: 20040050373
    Abstract: A device and method to extend the useful lubricant life in a diesel engine equipped with an Exhaust Gas Recirculation (EGR) system consisting of placing a chemical filter in an area of relatively higher humidity either in the EGR stream or near the intake manifold. In some cases, placing chemical filters in both locations would be preferred. This device may also be used in combination with a chemical filter placed in the lubricant recirculation system which produces a synergistic effect beyond the individual effects of either component.
    Type: Application
    Filed: July 15, 2003
    Publication date: March 18, 2004
    Inventors: Jason Zhisheng Gao, Mahmoud Mostafa Hafez, Riccardo Conti
  • Lubrication system for internal combustion engines (law952)
    Patent number: 6376435
    Abstract: A binary two phase engine oil composition having two substantially immiscible liquid phases exhibits improved fuel economy which is maintained over an extended period. The first liquid phase comprises a base oil, natural or synthetic. The second liquid phase is a polar organic liquid, preferably a complex alcohol ester, preferably derived from a polyol, a polybasic acid, and a monohydric alcohol.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: April 23, 2002
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Mahmoud Mostafa Hafez, Ulrich Witten, Paul Simon Woolley, Hiroki Kurosawa